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Ludwigite Group

A material that is NOT an approved mineral species

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Photos of Ludwigite Group (343)

Ludwigite Group Gallery Search Photos of Ludwigite Group

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Ludwigite

Nordmark Odal Field, Filipstad, Värmland County, Sweden

Azoproite

La Aljorra Quarries, La Aljorra, Cartagena, Murcia, Spain

Azoproite, etc.

Tazheranskii Massif, Lake Baikal area, Irkutsk Oblast, Russia

Ludwigite

Nordmark Odal Field, Filipstad, Värmland County, Sweden

Azoproite

La Aljorra Quarries, La Aljorra, Cartagena, Murcia, Spain

Azoproite, etc.

Tazheranskii Massif, Lake Baikal area, Irkutsk Oblast, Russia

Ludwigite

Nordmark Odal Field, Filipstad, Värmland County, Sweden

Azoproite

La Aljorra Quarries, La Aljorra, Cartagena, Murcia, Spain

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About Ludwigite GroupHide

This page provides mineralogical data about Ludwigite Group.

Unique IdentifiersHide

Mindat ID:

29305

Long-form identifier:

mindat:1:1:29305:9

GUID
(UUID V4):

6b53c9c5-1e9b-48b4-bf90-ba8d6093c0af

Crystal StructureHide

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2x2x2 | 3x3x3 | 4x4x4

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0014105	Bonaccordite	Perkins D A, Attfield J P (1991) Resonant powder X-ray determination of the cation distribution in FeNi2BO5 Journal of the Chemical Society, Chemical Communications 1991 229-231	1991	synthetic	293
0005368	Fredrikssonite	Burns P C, Cooper M A, Hawthorne F C (1994) Jahn-Teller-distorted MnO6 octahedra in fredrikssonite, the fourth polymorph of Mg2Mn(BO3)O2 The Canadian Mineralogist 32 397-403	1994		293
0005628	Ludwigite	Irwin M B, Peterson R C (1999) The crystal structure of ludwigite The Canadian Mineralogist 37 939-943	1999	Crestmore quarry, California, USA	293
0018467	Ludwigite	Brovkin A A, Rozhdestvenskaya I V, Rykova E A (2002) Cation distribution in the structure of titanium-containing ludwigite Crystallography Reports 47 412-414	2002	Tazheran massif	293
0014914	Ludwigite	Holtstam D (2001) Crystal chemistry of a manganian ludwigite Neues Jahrbuch fur Mineralogie, Monatshefte 2001 520-528	2001	Jakobsberg Fe-Mn oxide deposit, Filipstad, Varmland, Sweden	293
0000909	Vonsenite	Swinnea J S, Steinfink H (1983) Crystal structure and Mossbauer spectrum of vonsenite, 2FeOFeBO3* American Mineralogist 68 827-832	1983		293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Bonaccordite'
loop_
_publ_author_name
'Perkins D A'
'Attfield J P'
_journal_name_full 'Journal of the Chemical Society, Chemical Communications'
_journal_volume 1991 
_journal_year 1991
_journal_page_first 229
_journal_page_last 231
_publ_section_title
;
 Resonant powder X-ray determination of the cation distribution in FeNi2BO5
;
_database_code_amcsd 0014105
_chemical_compound_source 'Synthetic'
_chemical_formula_sum '(Fe Ni2) B O5'
_cell_length_a 9.21048
_cell_length_b 12.23794
_cell_length_c 3.00620
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 338.851
_exptl_crystal_density_diffrn      5.176
_symmetry_space_group_name_H-M 'P b a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  'x,y,-z'
  '-x,-y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
FeM1   0.00000   0.00000   0.00000   0.08800   0.00165
NiM1   0.00000   0.00000   0.00000   0.91200   0.00165
FeM2   0.50000   0.00000   0.50000   0.38500   0.00165
NiM2   0.50000   0.00000   0.50000   0.61500   0.00165
FeM3  -0.00010   0.28140   0.00000   0.14400   0.00165
NiM3  -0.00010   0.28140   0.00000   0.85600   0.00165
FeM4   0.73780   0.38480   0.50000   0.61900   0.00165
NiM4   0.73780   0.38480   0.50000   0.38100   0.00165
B   0.27400   0.36020   0.50000   1.00000   0.00380
O1   0.85160   0.04380   0.50000   1.00000   0.00165
O2   0.39100   0.07630   0.00000   1.00000   0.00165
O3   0.62760   0.13940   0.50000   1.00000   0.00165
O4   0.10380   0.14440   0.00000   1.00000   0.00165
O5   0.84970   0.23950   0.50000   1.00000   0.00165

Relationship of Ludwigite Group to other SpeciesHide

Group Members:

Azoproite	(Mg,Fe²⁺)₂(Fe³⁺,Ti,Mg)(BO₃)O₂	Orth. mmm (2/m 2/m 2/m) : Pbam
Bonaccordite	Ni₂Fe³⁺(BO₃)O₂	Orth. mmm (2/m 2/m 2/m) : Pbam
Fredrikssonite	Mg₂(Mn³⁺,Fe³⁺)(BO₃)O₂	Orth. mmm (2/m 2/m 2/m) : Pbam
Ludwigite	Mg₂Fe³⁺(BO₃)O₂	Orth. mmm (2/m 2/m 2/m) : Pbam
Marinaite	Cu₂Fe³⁺O₂(BO₃)	Mon. 2/m : P2₁/b
Savelievaite	Mg₂Cr³⁺O₂(BO₃)	Orth. mmm (2/m 2/m 2/m) : Pbam
Vonsenite	Fe²⁺₂Fe³⁺(BO₃)O₂	Orth. mmm (2/m 2/m 2/m) : Pbam

Minerals structurally related to group:

Warwickite Group

Structurally related to group(s):

Warwickite Group

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Ludwigite Group in petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

Metamorphic rock
- Metasomatic-rock
  - Skarn
    - Magnesian-skarn

Internet Links for Ludwigite GroupHide

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References for Ludwigite GroupHide

Reference List:

Localities for Ludwigite GroupHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Afghanistan
Ghazni Malistan District ⓘ Nayak Fe-B occurrence	[Ludwigite] *Orris, G.J., Bliss, J.D. (2002) Mine and mineral occurrences of Afghanistan. Open-File Report* 2002-110. US Geological Survey doi:10.3133/ofr02110**
Muqur District ⓘ Maghn Sn occurrence	[Ludwigite] *Orris, G.J., Bliss, J.D. (2002) Mine and mineral occurrences of Afghanistan. Open-File Report* 2002-110. US Geological Survey doi:10.3133/ofr02110**
Kandahar Shah Wali Kot District ⓘ Ghbargay Cu-Bi-Sn occurrence	[Ludwigite] *Orris, G.J., Bliss, J.D. (2002) Mine and mineral occurrences of Afghanistan. Open-File Report* 2002-110. US Geological Survey doi:10.3133/ofr02110**
Urozgan Gizab District ⓘ Buzghala Au-Cu occurrence	[Ludwigite] *Orris, G.J., Bliss, J.D. (2002) Mine and mineral occurrences of Afghanistan. Open-File Report* 2002-110. US Geological Survey doi:10.3133/ofr02110**

Argentina
Jujuy Province Humahuaca Department El Aguilar ⓘ Aguilar Mine	[Ludwigite] Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
ⓘ Esperanza prospect	[Vonsenite] Singer, Donald A., Berger, Vladimir I., Moring, Barry C. (2009) Sediment-Hosted Zinc-Lead Deposits of the World - Database and Grade and Tonnage Models. Open-File Report 2009-1252. US Geological Survey doi:10.3133/ofr20091252

Australia
Tasmania Waratah-Wynyard municipality Corinna-Savage River district ⓘ Savage River Mines	[Ludwigite] Bottrill & Taheri, 2008, Savage River mine, Unpub. Rept, Mineral Resources Tasmania
Waratah district Waratah ⓘ Mount Bischoff Mine	[Vonsenite] *Bottrill, RS (2018) MINERALOGICAL ANALYSES, MT BISCHOFF. Mineralogical/Petrology Report* LJN2018-111.5. Mineral Resources Tasmania**
West Coast municipality Mt Lindsay mineral field ⓘ Mt Lindsay mine (Parsons Hood)	[Vonsenite] R Bottrill, unpublished research
Zeehan mining district Mt Heemskirk mineral field ⓘ St Dizier mine	[Ludwigite] Tested by XRD and SEM-EDS by R Bottrill, unpub. rept. *Bottrill, Ralph S., Baker, William. E. (2008) A Catalogue of the Minerals of Tasmania. Geological Survey of Tasmania Bulletin 73, Mineral Resources Tasmania. 1-254*
ⓘ Tenth Legion mine	[Ludwigite] *Bottrill, Ralph S., Baker, William. E. (2008) A Catalogue of the Minerals of Tasmania. Geological Survey of Tasmania Bulletin 73, Mineral Resources Tasmania. 1-254*
North Dundas ⓘ Renison Bell Mine (Renison Mine)	[Ludwigite] Patterson, D.J., 1979, Renison mine, Tasmania. Unpub. PhD thesis, Uni. Tas.

Austria
Salzburg Zell am See District Kaprun ⓘ Lechnerberg slag locality	[Vonsenite] Kolitsch, U. & Brandstätter, F. (2012): 1750) Anglesit, Apatit, Azurit, Fayalit, Humboldtin, Laihunit, Magnetit, Vonsenit und eine Cu-S-Si-O-H-Phase aus einer Kupferschlacke vom Lechnerberg bei Kaprun, Salzburg. Pp. 153-155 in Niedermayr, G. et al. (2012): Neue Mineralfunde aus Österreich LXI. Carinthia II, 202./122., 123-180.
Tyrol Schwaz District Finkenberg Schlegeisgrund (Schlegeis valley) ⓘ Furtschaglkar	[Ludwigite] Franz, G., Ackermand, D., Koch, E. (1981) Karlite, Mg7(BO3)3(OH,Cl)5 a new borate mineral and associated ludwigite from the Eastern Alps. American Mineralogist: 66: 872-877.

Bulgaria
Yambol Province Tundzha Municipality Krumovo ⓘ Krumovo iron mine	[Ludwigite] Marcus Voigt Collection

Canada
Ontario ⓘ Bancroft area	[Ludwigite] 162-165. Grice, Joel D. (1989) Bancroft: the Mineral Capital of Canada. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages, 92-99
Hastings County Town of Bancroft Dungannon Township York River area ⓘ York River skarn	[Ludwigite] Sabina, A.P. (1982): Some rare minerals of the Bancroft area. Mineralogical Record 13 (4), 226-228
Québec Outaouais Les Collines-de-l'Outaouais RCM Chelsea ⓘ Cross quarry	[Ludwigite] *Sabina, Ann P. (1987) Rocks and minerals for the collector, Hull-Maniwaki, Quebec, Ottawa-Peterborough, Ontario. Miscellaneous report* 41. Geological Survey of Canada**
La Pêche Wakefield ⓘ Maxwell quarry	[Ludwigite] Hull-Maniwaki, Quebec, Ottawa-Peterborough, Ontario. GSC Misc. Report 41, 34-35 p. Sabina, A.P. (1987) Rocks & Minerals for the collector
Yukon Watson Lake mining district ⓘ Mindy prospect	[Vonsenite] Liverton, T., 2016. A-type granite plutons and tin skarns in southeast Yukon: Mindy prospect and surrounding granite of 105C/9. In: Yukon Exploration and Geology 2015, K.E. MacFarlane and M.G. Nordling (eds.), Yukon Geological Survey, p. 151-164.

China
Anhui Chuzhou Tianchang City ⓘ Yeshan Fe-B deposit	[Ludwigite] Zhao, S., Brzozowski, M. J., Mueller, T., Wang, L., & Li, W. (2022). Skarn classification and element mobility in the Yeshan Iron Deposit, Eastern China: Insight from lithogeochemistry. Ore Geology Reviews, 145, 104909.
Huaibei Suixi Co. Sanpu ore field ⓘ Qianchang Mine	[Ludwigite] Yanjing Chen, Huayong Chen, Khin Zaw, Pirajno, F., and Zengjie Zhang (2007): Ore Geology Reviews 31, 139-169.
ⓘ Qinlou Mine	[Ludwigite] Zhao, Yiming, Zhang, Yinan, Bi, Chengsi (1999) Geology of gold-bearing skarn deposits in the middle and lower Yangtze River Valley and adjacent regions. Ore Geology Reviews, 14 (3). 227-249 doi:10.1016/s0169-1368(99)00008-6
ⓘ Sanpu Cu-Fe deposit	[Ludwigite] Yiming Zhao and Daxin Li (2003): Mineral Deposits 22(4), 345-359
Xuancheng Xuanzhou District ⓘ Magushan Mine (East Tongshan Mine)	[Ludwigite] Lianxing Gu, Khin Zaw, Wenxuan Hu, Kaijun Zhang, Pei Ni, Jinxiang He, Yaotong Xu, Jianjun Lu, and Chunming Lin (2007): Ore Geology Reviews 31, 107-138.
Guangdong Heyuan Lianping Co. ⓘ Dading Fe-Sn deposit	[Ludwigite] Jianxiong Zhou and Jinyan Lu (1981): Acta Mineralogica Sinica 1(4), 193-199 Lianshun Feng (1986): Geology and Prospecting 22(3), 21-27
Qingyuan Yangshan County ⓘ Jiulongping Mine	[Ludwigite] Zhenhai Wang (2000): Guangdong Geology 15(2), 9-18
Hebei Baoding Laiyuan County ⓘ Zhijiazhuang Mine	[Ludwigite] Chang Zhaoshan and Feng Zhongyan (1996): Acta Scientiarum Naturalium Universitatis Pekinensis 32(6), 724-733 Guoxi Ma (2002): Mineral Deposits 21(suppl.), 342-345
Hunan Hengyang Changning Co. Dayishan Sn-polymetallic ore field ⓘ Banbianjie prospect	[Ludwigite] Rongwen Zhou and Zhishun Chen (1991): Geology and Prospecting 27(3), 29-31
ⓘ Qiliping Sn-Fe deposit	[Ludwigite] Yang Guangming, Peng Zhizhong, and Pan Zhaolu (1985): Acta Mineralogica Sinica 5(2), 97-101 Aleksandrov, S.M. (1998): Geochemistry of skarn and ore formation in dolomites. VSP (Utrecht, Tokyo), 300 pp.
ⓘ Tangshi B deposit	[Ludwigite] Rongwen Zhou and Zaixi Li (1992): Hunan Geology 11(1), 71-74
Yongzhou Dao Co. ⓘ Weijia W deposit	[Ludwigite] Fushun Li, Ruhua Kang, Xuyun Hu, Wuliang Ma, Xinhua Huang, Yonghong Zeng, Junbin Tang, Xian Zhu, Zhiwei Qin, Jie Zhao, and Libin He (2012): Geology in China 39(2), 445-457
Inner Mongolia Chifeng City (Ulanhad League; Chifeng Prefecture) Hexigten Banner (Keshiketeng Co.) ⓘ Shijiangshan mine (Dashishan mine) ?	[Ludwigite] Ottens, B. & Bin, J. (2014): Seltene Boratmineralien aus der Inneren Mongolei, China. Lapis, 39 (7/8), 66-68.
Jiangsu Nantong Qidong Co. ⓘ Wanghao Fe deposit	[Ludwigite] Kamitani, M., Okumura, K., Teraoka, Y., Miyano, S., and Watanabe, Y. (2007): Mineral Resources Map of East Asia. Geological Survey of Japan.
Jilin Tonghua Ji'an Co. ⓘ Gaotaigou Boron deposit	[Ludwigite] Zongkai Lu (1984): Jilin Geology 3(3) Keevil, Halley A., Monecke, Thomas, Goldfarb, Richard J., Feng, Tao (2022) Metallogeny of the Hunjiang basin, northeastern North China block. Ore Geology Reviews, 148. 104995 doi:10.1016/j.oregeorev.2022.104995
ⓘ Huanziyao Mine	[Ludwigite] Keevil, Halley A., Monecke, Thomas, Goldfarb, Richard J., Feng, Tao (2022) Metallogeny of the Hunjiang basin, northeastern North China block. Ore Geology Reviews, 148. 104995 doi:10.1016/j.oregeorev.2022.104995
Tonghua Co. ⓘ Erdaohezi Mine	[Ludwigite] Mingshou Yang (1983): Geology and Prospecting 19(2), 8-18
Liaoning Dalian Wafangdian City ⓘ Huatong Mine (Huatungkou Mine)	[Ludwigite] Matsuda, K. (1969) Copper-bearing contact deposits of Hua-tung-kou, Fu Hsien, Feng-tien province, Manchuria (in: Geology and Mineral Resources of the Far East, vol. 2, pp 414-422, Tokyo University Press) Zhiqian Zhang and Jianning Wang (2009): Gold Science and Technology 17(2), 34-37, 53 Zhiqian Zhang, Jianning Wang, and Hongfan Qu (2011): Gold Science and Technology 19(1), 38-41
Dandong Fengcheng City ⓘ Wengquan'gou Boron deposit	[Ludwigite] Rongge Xiao, Oi Takao, Hongcai Fei, and Masao Nomura (2003): Geoscience 17(2), 137-142 Yiming Zhao and Daxin Li (2003): Mineral Deposits 22(4), 345-359 Xuehui Xia, Fei Yan, Yuhai Zhao, and Wenzong Chang (2006): Mineral Deposits 25(1), 83-88 Cuizhi Wang, Rongge Xiao, and Jingdang Liu (2008): Acta Geoscientia Sinica 30(5), 542-552 Guyue Hu, Yanhe Li, Changfu Fan, Kejun Hou, Chengyu Wang, and Guiqing Xie (2014): Mineral Deposits 33(4), 821-832
Yingkou Dashiqiao City ⓘ Houxianyu Boron deposit	[Ludwigite] Rongge Xiao, Oi Takao, Hongcai Fei, and Masao Nomura (2003): Geoscience 17(2), 137-142 Cuizhi Wang, Rongge Xiao, Jingdang Liu, Hongcai Fei, Wenwu Wang, Hongchun Zhou, and Jingqing Liu (2006): Mineral Deposits 25(6), 683-692 Rongge Xiao, Jingdang Liu, Zhen Wu, Bin Wang, and Jiarui Feng (2007): Geoscience 21(4), 638-644
Qinghai Haixi Mongol and Tibetan Autonomous Prefecture Dulan County Wulonggou gold field ⓘ Wulonggou Cu-Zn deposit	[Ludwigite] Guoqiang Tian, Duolu Zhu, and Yong Tian (2006): Gansu Metallurgy 28(3), 63-65
Xinjiang Kezilesu Autonomous Prefecture (Kizilsu Autonomous Prefecture; Qizilsu Autonomous Prefecture) Atushi Co. (Artux Co.; Atux Co.; Atush Co.) ⓘ Cheyibulake polymetallic occurrence (Qieyibulake polymetallic occurrence)	[Ludwigite] Fuquan Yang, Huijuan Deng, Haodong Xia, Boyong Ma, and Liben Wang (2003): Xinjiang Geology 21(4), 426-432
Yunnan Baoshan Tengchong County Tengchong Sn belt Diantan ⓘ Diantan Sn-Fe deposit	[Ludwigite] Feibao Wu and Zongyu Li (1986): Geology and Prospecting 22(8), 20-26 Shilu Zhang (1986): Mineral Deposits 5(3), 19-26

Czech Republic
Karlovy Vary Region Karlovy Vary District Boží Dar Zlatý Kopec ⓘ Zlatý Kopec skarn deposit	[Ludwigite] Šrein, V., Hloušek, J.: Ludwigit a hulsit z Krušných hor. Bulletin mineralogicko-petrografického oddě lení Národního muzea v Praze, 1998, roč . 6, s. 243-246.
Ústí nad Labem Region Chomutov District Měděnec ⓘ Horní Halže	[Ludwigite] Robert Vaňo specimens
ⓘ Mýtinka	[Ludwigite] Roman Gramblička collection

Finland
South Savo Pieksämäki ⓘ Virtasalmi copper mine	[Ludwigite] Virtasalmi-Copper Database. Geological Survey of Finland (2009)

France
Occitanie Pyrénées-Orientales Céret Prats-de-Mollo-la-Preste ⓘ Costabonne mines (Costabona mines)	[Ludwigite] Goujou, Jean-Christian, Guitard, Gérard, Berbain, Christian (2000) Le massif de Costabonne, 2464m (Pyrénées-Orientales) 2. Un aperçu de la mineralogie du gisement. Le Règne Minéral, 6 (32) 5-12

Germany
Lower Saxony Goslar District Bad Harzburg Radau valley ⓘ Gabbro Quarry	[Ludwigite] Dennis Harries Collection
Rhineland-Palatinate Vulkaneifel Gerolstein Gerolstein Roth ⓘ Rother Kopf	[Vonsenite] Blaß, G. & Schüller, W. (2012): Der Rother Kopf in der Vulkaneifel. Lapis, 37 (3), 20-29.
Saxony Erzgebirgskreis ⓘ Breitenbrunn	[Ludwigite] Lapis, 17 (10), 13-24+82.
Antonsthal ⓘ Fällbach Shaft	[Ludwigite] www.mineralienatlas.de (2016) http://www.mineralienatlas.de/lexikon/index.php/Deutschland/Sachsen/Chemnitz%2C%20Direktionsbezirk/Erzgebirgskreis/Schwarzenberger%20Kuppel/Antonsthal/F%E4llbach
ⓘ Shaft 235	[Ludwigite] Gröbner J., Kolitsch U. Gröbner J., Kolitsch, U. (2006) Neufunde aus dem Erzgebirge (II), Mineralien-Welt: 17(3): 22-27.
ⓘ Globenstein skarn	[Ludwigite] Reinhardt, N., Gerdes, A., Beranoaguirre, A., Frenzel, M., Meinert, L. D., Gutzmer, J., & Burisch, M. (2022). Timing of magmatic-hydrothermal activity in the Variscan Orogenic Belt: LA-ICP-MS U–Pb geochronology of skarn-related garnet from the Schwarzenberg District, Erzgebirge. Mineralium Deposita, 1-17.
Schwarzenberg ⓘ Pöhla-Tellerhäuser Mine	[Ludwigite] Collection of Chester S. Lemanski, Jr.

Italy
Campania Naples Bacoli ⓘ Torregaveta	[Vonsenite] Russo M. (2008): Zeolites from Campi Flegrei. Bollettino AIZ Series/Report, Vol. 31 (2008), 13-23. Publisher: Associazione Italiana Zeoliti onlus
Ischia Island ⓘ Forio	[Vonsenite] Massim Russo collection
Naples ⓘ Pianura	[Vonsenite] Federico M. (1969): Vonsenite nel Piperno di Pianura (Campi Flegrei, Napoli). Per. Mineral., 38, 81-85 Aleksandrov S.M. [Александров С.М.] (1974): Geochemical peculiarities of the occurrences of endogenic borate mineralisation in Italy [Геохимические особенности проявления эндогенной боратной минерализации в Италии]. Geokhimiya, 10, 1440-1449 (in Russian).
ⓘ Procida Island	[Vonsenite] Russo, M. (2008) Zeolites from Campi Flegrei, Bollettino AIZ Series/Report, Vol. 31 (2008), Publisher: Associazione Italiana Zeoliti onlus
Somma-Vesuvius Complex Mount Somma Ercolano ⓘ Scala lava flow	[Vonsenite] Monticelli, T., and Covelli, N. (1825) Prodromo della Mineralogia Vesuviana. Volume I. Orittognosia. Da' Torchi del Tramater, Napoli, XXXIV+483 pages + 19 plates Monticelli, T. (1841) Memorie sulla lava della Scala. In: Opere dell'Abate Teodoro Monticelli. Volume II. Stabilimento Tipografico Dell'Aquila, Napoli, pages 96-105.
Sant'Anastasia ⓘ Cupa dell'Olivella	[Vonsenite] M. Carati - Guida alla mineralogia vesuviana - Calderini, Bologna, 1982
ⓘ Mount Vesuvius	[Vonsenite] Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI
Terzigno ⓘ Vitiello Quarry (Cava Vitiello)	[Vonsenite] Luigi Chiappino data
Torre del Greco ⓘ Camaldoli della Torre	[Vonsenite] Carati, M. (1981) Mineralogia Vesuviana: Camaldoli della Torre (NA). Notiziario del Gruppo Mineralogico Geologico Napoletano, 2, 4, 15-16 Carati, M. (1982) Guida alla mineralogia vesuviana. Edizioni Calderini, Bologna, 121 pages Russo, M., and Punzo, I. (2004) I Minerali del Somma-Vesuvio. AMI Associazione Micro-mineralogica Italiana, Tipografia Fantigrafica s.r.l., Cremona, 320 pages.
ⓘ Villa Inglese quarries	[Vonsenite] Russo, M. (1981) Mineralogia Campana: Le lave del 1631. Cava di Villa Inglese. Notiziario del Gruppo Mineralogico Geologico Napoletano, 2, 2, 7-12 Carati, M. (1982) Guida alla mineralogia vesuviana. Edizioni Calderini, Bologna, 121 pages Russo, M. (2003) Mineralogia vesuviana: le cave di Villa Inglese (Torre del Greco, NA). Micro (località), 1-10 Russo, M., and Punzo, I. (2004) I Minerali del Somma-Vesuvio. AMI Associazione Micro-mineralogica Italiana, Tipografia Fantigrafica s.r.l., Cremona, 320 pages.
Salerno Nocera Inferiore ⓘ Fiano tuff quarries	[Vonsenite] Del Caldo, A., Moro, C., Gramaccioli, C.M., Boscardin, M. (1973): Guida ai minerali. Fratelli Fabbri Editori, Milano, 208 pp. Carati, M. (1988): I minerali degli inclusi metamorfosati nel Tufo Grigio Campano. Notiziario del Gruppo Mineralogico Geologico Napoletano, 18, 5-12 Russo, M. & Punzo, I. (2010 communication)
Lazio Frosinone Province ⓘ Pofi	[Vonsenite] Mattias P.P. (1969): I minerali rinvenuti nelle cavità di una tefrite leucitica nella zona di Pofi (Frosinone). Per. Mineral., 38, 1, 87-108 Boscardin M. (1974): Informazioni di mineralogia italiana. 42) Minerali di Pofi (Frosinone). Notizie Gr. Mineral. Lombardo, 5, 2 (Giugno 1974), 30.
Metropolitan City of Rome Capital Campagnano di Roma ⓘ Monte Cavalluccio	[Vonsenite] Della Ventura, Bonazzi, Obertia and Ottolini, Am. Min. vol. 87 p. 739 (2002)
ⓘ S. Angelo Mount	[Vonsenite] Giorgio Bortolozzi (visual identification)
Monte Compatri Laghetto (Laghetto di Montecompatri) ⓘ Laghetto quarries	[Vonsenite] Stoppani, F.S., and Curti, E. (1982) I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp. Liotti, L. (1995) I minerali del complesso vulcanico dei Colli Albani. Seconda parte. Rivista Mineralogica Italiana, 18, 1 (1-1995), 55-70 Carlini, R., and Signoretti, E. (2018) Il Lazio classico: le cave di leucitite della provincia di Roma (Vallerano, Laghetto e Osa). Fossils & Minerals, 4, 24-53.
Rome ⓘ Capo di Bove	[Vonsenite] Fornaseri, M., and Turi, B. (1969) Carbon and oxygen isotopic composition of carbonates in lavas and ejectites from the Alban Hills, Italy. Contributions to Mineralogy and Petrology, 23, 244-256.
ⓘ Corcolle	[Ludwigite] Bachechi, F., Federico, M., and Fornaseri, M. (1966 a) Prima segnalazione di ludwigite e di magnesioferrite nelle geodi delle "pozzolane nere" di Corcolle (regione vulcanica dei Colli Albani). Periodico di Mineralogia, 35, 717 Bachechi, F., Federico, M., and Fornaseri, M. (1966 b) La ludwigite e i minerali che l'accompagnano nelle geodi delle "pozzolane nere" di Corcolle (Tivoli, Colli Albani). Periodico di Mineralogia, 35, 975-1022 Del Caldo, A. (1971) Località mineralogiche consigliate. Le vulcaniti laziali. 2) Minerali della pozzolana romana. Notizie del Guppo Mineralogico Lombardo, 2, 1 (marzo 1971), 9 Del Caldo, A., Moro, C., Gramaccioli, C.M., and Boscardin, M. (1973) Guida ai minerali. Fratelli Fabbri Editori, Milano, 208 pp.
Le Capannelle ⓘ Casal Rotondo quarries	[Vonsenite] Fornaseri, M., and Turi, B. (1969) Carbon and oxygen isotopic composition of carbonates in lavas and ejectites from the Alban Hills, Italy. Contributions to Mineralogy and Petrology, 23, 244-256 Stoppani, F.S., and Curti, E. (1982) I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.
Osteria dell'Osa ⓘ Osa Quarry	[Vonsenite] Fornaseri, M., and Turi, B. (1969) Carbon and oxygen isotopic composition of carbonates in lavas and ejectites from the Alban Hills, Italy. Contributions to Mineralogy and Petrology, 23, 244-256 Del Caldo, A. (1971) Località mineralogiche consigliate. Le vulcaniti laziali. 1) Cava di selce dell'Osa. Notizie del Guppo Mineralogico Lombardo, 2, 1 (marzo 1971), 6-8 Del Caldo, A., Moro, C., Gramaccioli, C.M., and Boscardin, M. (1973) Guida ai minerali. Fratelli Fabbri Editori, Milano, 208 pp. Aleksandrov, S.M. [Александров, С.М.] (1974) Geochemical peculiarities of the occurrences of endogenic borate mineralisation in Italy [Геохимические особенности проявления эндогенной боратной минерализации в Италии]. Geokhimiya, 10, 1440-1449 (in Russian) De Michele, V. (1974) Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp. Stoppani, F.S., and Curti, E. (1982) I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pages Carlini, R., and Signoretti, E. (2018) Il Lazio classico: le cave di leucitite della provincia di Roma (Vallerano, Laghetto e Osa). Fossils & Minerals, 4, 24-53.
Valleranello ⓘ Vallerano Quarries	[Vonsenite] Zambonini, F. (1902) Kurzer Beitrag zur chemischen Kenntniss einiger Zeolithe der Umgegend Roms. Neues Jahrbuch für Mineralogie, Geologie und Palaeontologie, 2, 63-96 Fornaseri, M., and Turi, B. (1969) Carbon and oxygen isotopic composition of carbonates in lavas and ejectites from the Alban Hills, Italy. Contributions to Mineralogy and Petrology, 23, 244-256 De Michele, V. (1974) Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol., 408 pp. Stoppani, F.S., and Curti, E. (1982) I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp. Liotti, L. (1995) I minerali del complesso vulcanico dei Colli Albani. Seconda parte. Rivista Mineralogica Italiana, 18, 1 (1-1995), 55-70 Carlini, R., and Signoretti, E. (2018) Il Lazio classico: le cave di leucitite della provincia di Roma (Vallerano, Laghetto e Osa). Fossils & Minerals, 4, 24-53.
ⓘ Stracciacappe caldera	[Vonsenite] Gresta, S., Duronio, F., Mancinella D. (2002): Geositi e Sistema delle Aree Protette del Lazio: idee per la geoconservazione. Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 48-55
Viterbo Province ⓘ Bassano Romano	[Vonsenite] *Carloni, L., Signoretti, E. (2002) Le sanadiniti di Bassano Romano. Distretto Vulcanico Sabatino. Il Cercapietre 1-2, 28-36*
ⓘ Capranica	[Vonsenite] American Mineralogist, Volume 86, pages 1066–1075, 2001
ⓘ Campo Padella	[Vonsenite] Della Ventura, Giancarlo, Williams, C. Terry, Cabella, Roberto, Oberti, Roberta, Caprilli, Enrico, Bellatreccia, Fabio (1999) Britholite-hellandite intergrowths and associated REE-minerals from the alkali-syenitic ejecta of the Vico volcanic complex (Latium, Italy): petrological implications bearing on REE mobility in volcanic systems. European Journal of Mineralogy, 11 (5). 843-854 doi:10.1127/ejm/11/5/0843 Oberti, R., Ottolini, L., Cámara, F., Della Ventura, G. (1999) Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals. American Mineralogist, 84, 913–921.
ⓘ Cassia Road km 61.5	[Vonsenite] "Giorgio Bortolozzi (visual identification)"
Gradoli ⓘ Poggio Pinzo (Gradoli pozzolana quarry)	[Vonsenite] Signoretti, E., Bosco, P. (2001) Le cave di Gradoli e Onano. Il Cercapietre: 1/2-2001: 10-25.
Montalto di Castro Pietra Massa Locality ⓘ Campomorto Quarry	[Vonsenite] "Giorgio Bortolozzi (visual identification)"
Onano ⓘ Montenero Quarry	[Vonsenite] Cresta, S., Duronio, F., Mancinella, D. (2002): Geositi e sistema delle arre protette del Lazio: idee per la geoconservazione. Il Cercapietre, 1-2/2002, 48-55
Soriano nel Cimino ⓘ Le Piagge	[Vonsenite] Federico, M. (1968) Una tridimite monoclina di bassa temperatura nelle rocce trachitiche del Vulcano Cimino. Periodico di Mineralogia, 37, 215-238 Stoppani, F.S., and Curti, E. (1982) I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.
Valentano ⓘ Mt Saliette	[Vonsenite] Burli, M., Caponera, I., Signoretti, E. (2007): Le "sanidiniti" di Monte Saliette (Valentano, VT). Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 13-18
ⓘ Vetralla	[Vonsenite] AMI UK Service
ⓘ La Botte (Botte)	[Vonsenite] "Giorgio Bortolozzi (visual identification)"
ⓘ Pian di San Martino	[Vonsenite] "Giorgio Bortolozzi (visual identification)"
ⓘ Tre Croci	[Vonsenite] American Mineralogist, Volume 91, pages 1170-1177, 2006
ⓘ Villa San Giovanni in Tuscia	[Vonsenite] Carlini, R., Signoretti, E., 2003. Località minori del vulcano Vicano: Villa S.Giovanni in Tuscia e Mazzocchio. Il Cercapietre. Not. del Gruppo Mineralogico Romano, 1-2: 33-41
Viterbo ⓘ Le Carcarelle	[Vonsenite] Flavio G. Taricco collection
ⓘ San Martino al Cimino	[Vonsenite] Scherillo A. (1940): I proietti con minerali boriferi dei Vulcani Cimini. Per. Mineral., 11, 367-391 Stoppani F.S, Curti E. (1982): I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.
Lombardy Sondrio Province Valfurva Cedec Valley ⓘ Bottiglia Pass (Königsjoch)	[Ludwigite] Bedognè, F., Montrasio, A., Sciesa, E. (2006) I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
ⓘ Cima delle Pale Rosse	[Ludwigite] Bedognè,F,,Montrasio A. & Sciesa E. (2006): I minerali della media-alta Valtellina delle Orobie valtellinesi e della Val Poschiavo. Bettini, Sondrio, Italia, 255.
Zebrù Valley ⓘ Vedretta della Miniera (Cima della Miniera)	[Ludwigite] Bedognè, F., Montrasio, A., and Sciesa, E. (2006) I minerali della medio-alta Valtellina, delle Orobie valtellinesi e della val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.
Piedmont Metropolitan City of Turin Lessolo Calea ⓘ Brosso Mine	[Ludwigite] Campostrini, I. (2001) Le miniere di Brosso. Monografie XXIX. Museo Regionale di Scienze Naturali, Ed., Torino, 185 pages.
Sardinia Sassari Province ⓘ Alghero	[Vonsenite] Peter Neschen collection
ⓘ Nulvi	[Vonsenite] Giorgio Bortolozzi (visual identification).
ⓘ Ploaghe	[Vonsenite] "Giorgio Bortolozzi (visual identification)"
ⓘ Villanova Monteleone - Monteleone Rocca Doria area	[Vonsenite] Paolo Capitanio collection
Sicily Metropolitan City of Messina Eolie Islands (Aeolian Islands) Lipari Lipari Island Canneto Punta Castagna ⓘ Pumex Quarry (Porticello Quarry)	[Vonsenite] F. Brignoli self collected
Vulcano Island ⓘ La Fossa crater	[Vonsenite] PANICHI U. (1924): Contributo allo studio dei minerali dell'Isola di Vulcano. - Memorie della Società Italiana delle Scienze (detta dei XL) - serie 3 - 19, 3-55.
Umbria Terni Province San Venanzo ⓘ Vispi Quarry (incl. Celli; Pian di Celle volcano) ?	[Ludwigite] Meli R. (1997) - Giacimenti da non dimenticare: i minerali della vulcaniti di San Venanzo (Terni). Riv. Miner. Ital. 3, pag. 269-275

Japan
Fukushima Prefecture Date District Kawamata ⓘ Haneyama mine (Hayama mine)	[Ludwigite] Alfredo Petrov collection SUGAKI, A., & HASEGAWA, S. (1952). The Nickel Deposit of the Hayama Mine, Fukushima Prefecture. Mining Geology, 2(6), 185-196.
Iwate Prefecture Kamaishi City ⓘ Kamaishi mine	[Vonsenite] Watanabe & Ito (1954) Mineralogical Journal, 1, 84-88.
Miyako City Kamineichi ⓘ Neichi mine	[Ludwigite] Watanabe et al (1963) Kotoite, Mg3(BO3)2, from the Neichi mine, Iwate prefecture, Japan. Proceedings of the Japan Academy, series B, 39, 164-169. Kato, A. (1973) Sakurai Koubutsu Hyohon, 39.
Miyazaki Prefecture Nishiusuki District Hinokage ⓘ Sengendera mine	[Vonsenite] Minakawa and Adachi (1990) Chigaku Kenkyu, 39, 91-95 大越悠数, 皆川鉄雄, & 濱根大輔. (2012). 宮崎県千軒平スカルン鉱床産ハルス石. 岩石鉱物科学, 41(3), 61-66.

Kazakhstan
Karaganda Region Balkhash Sayak Cu ore field ⓘ Sayak 4 Deposit (Sayak IV Deposit)	[Ludwigite] *Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.*

North Korea
North Hwanghae Province ⓘ Suan County	[Ludwigite] No reference listed
ⓘ Hol Kol Mine (Holgol; Suan; Namjong)	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
ⓘ Eastern orebody	[Ludwigite] watanabe, T. : Boron mineral resources in Korea (in: Geology and Mineral Resources of the Far East, University of Tokyo Press, 1969) Imai, A., & Anan, S. (2000). Sulfur isotope study and re‐examination of ore mineral assemblage of the Hol Kol and the Tul Mi Chung skarn‐type copper–gold deposits of the Suan mining district, Korean Peninsula. Resource Geology, 50(4), 213-228.
ⓘ North orebody (New orebody)	[Ludwigite] watanabe, T. : Boron mineral resources in Korea (in: Geology and Mineral Resources of the Far East, University of Tokyo Press, 1969) Imai, A., & Anan, S. (2000). Sulfur isotope study and re‐examination of ore mineral assemblage of the Hol Kol and the Tul Mi Chung skarn‐type copper–gold deposits of the Suan mining district, Korean Peninsula. Resource Geology, 50(4), 213-228.
ⓘ Western orebody	[Ludwigite] watanabe, T. : Boron mineral resources in Korea (in: Geology and Mineral Resources of the Far East, University of Tokyo Press, 1969)

Norway
Nordland Sortland Godfjorden ⓘ Mehus	[Ludwigite] *Bøe, Per (1997) Boratmineralet ludwigitt i høymetamorf marmor i Vesterålen. STEIN. Nordisk magasin for populær geologi, 24 (3) 130-136* Bøe, Per (1997) Boratmineralet ludwigitt i høymetamorf marmor i Vesterålen [The borate mineral ludwigite in a high-grade metamorphic marble in Vesterålen]. Norsk Bergverksmuseum Skrift, 12. 35-39

Pakistan
Khyber Pakhtunkhwa Province Mansehra District Kaghan Valley Naran ⓘ Sapat Gali	[Ludwigite] Jan, M. Q., & Khan, M. A. (1996). Petrology of gem peridot from Sapat mafic-ultramafic complex, Kohistan, NW Himalaya. Geological Bulletin, University of Peshawar, 29, 17-26. Moore, T. (2004): What's New in Minerals. Costa Mesa Show 2003. Mineralogical Record. 35 (2), 143-145

Peru
Junín ⓘ Yauli Province	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.

Romania
Bihor County Nucet ⓘ Băiţa mining district	[Ludwigite] Ş . Marincea: "Suanite in two boron-bearing magnesian skarns from Romania: data on a longtime ignored mineral species", Neues Jahrbuch für Mineralogie - Abhandlungen 182:183-192 (2006)
ⓘ Pietroasa	[Ludwigite] Ş MARINCEA, S. (2000). The influence of Al on the physical and crystallographic properties of ludwigite in three Romanian occurrences. European Journal of Mineralogy, 12(4), 809-823. . Marincea: "Suanite in two boron-bearing magnesian skarns from Romania: data on a longtime ignored mineral species", Neues Jahrbuch für Mineralogie - Abhandlungen 182:183-192 (2006)
Caraş-Severin County Moldova Nouă ⓘ Moldova Nouă Mine	[Ludwigite] www.minerals-of-the-carpathians,2009
ⓘ Ocna de Fier-Dognecea District	[Ludwigite] Cook, N.J., Ciobanu, C.L. (2001): Paragenesis of Cu-Fe ores from Ocna de Fier-Dognecea (Romania), typifying fluid plume mineralization in a proximal skarn setting. Min. Mag.: 65(3): 351–372.
ⓘ Ocna de Fier	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania MARINCEA, S. (2000). The influence of Al on the physical and crystallographic properties of ludwigite in three Romanian occurrences. European Journal of Mineralogy, 12(4), 809-823.
ⓘ Arhangheli quarry	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Delius quarry	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Iuliana Mine	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Stefan Nicolescu (1996) - Excursion Guide. Field trip E1, Banat and Transylvanian Gold District, Romania. M&M 3, 3rd International Conference on Mineralogy and Museums, Budapest, Hungary, June 9 - 13, 1996, 60 pp Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Jupiter mine	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Magnet quarry	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Reichenstein mine	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
ⓘ Simon Iuda deposit	[Ludwigite] Mineralogical Magazine, Vol. 65(3), pp. 351–372
ⓘ Terezia Mine	[Ludwigite] new data and review. The Canadian Mineralogist, 37(6), 1343-1362. Stefan Nicolescu (1996) - Excursion Guide. Field trip E1, Banat and Transylvanian Gold District, Romania. M&M 3, 3rd International Conference on Mineralogy and Museums, Budapest, Hungary, June 9 - 13, 1996, 60 pp. Marincea, S. (1999). Ludwigite from the type locality, Ocna de Fier, Romania
Cluj County Iara ⓘ Cacova Ierii	[Ludwigite] Marincea, S. (2000). Magnesian borates and associated minerals in the Cacova Ierii skarn deposit (Apuseni Mountains, Romania). Geonomos 8(1):1-7
ⓘ Iara Mine	[Ludwigite] MARINCEA, S. (2000). The influence of Al on the physical and crystallographic properties of ludwigite in three Romanian occurrences. European Journal of Mineralogy, 12(4), 809-823. www.geoecomar.ro (2015) http://www.geoecomar.ro/website/publicatii/supliment2008/15.pdf www.geoecomar.ro (2015) http://www.geoecomar.ro/website/publicatii/supliment2008/15.pdf

Russia
Buryatia Yeravninsky District Ozernoe ore cluster ⓘ Solongo B deposit	[Ludwigite] American Mineralogist, Volume 87, pages 1509–1513, 2002 Vladimirskaya, N. I. (1974): Alabandite in magnetite ores of the Solongo boron-iron ore deposit. In: Rundkvist, D. V. (Ed.), Miner. Paragenezisy Miner. Gidroterm. Mestorozhd. (1974), 118-122 (in Russian). Lapis 29(1), 47 (2004)
Chelyabinsk Oblast Kartalinsky District ⓘ Verblyuzhegorskoye Cr deposit	[Ludwigite] webmineral.ru (n.d.) https://webmineral.ru/deposits/unit.php?id=3623515
Kusinsky District Medvedevka ⓘ Praskov'e-Evgen'evskaya kop'	[Ludwigite] Pavel M. Kartashov data
Zlatoust Nazyamskie Mountains ⓘ Akhmatovskaya Kop' (Achmatovsk Mine)	[Ludwigite] Frank K. Mazdab collection sample FKM-426 www.rockptx.com (2022) https://www.rockptx.com/fkm-426-to-fkm-450/#FKM-426
Irkutsk Oblast Lake Baikal area ⓘ Tazheranskii Massif	[Azoproite] Konev A A, Lesedeva V S, Kashaev A A, Ushchapovskaya Z F (1970) Azoproite, a new mineral of the ludwigite group, Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 99, issue 2, 225-231 *Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.* Starikova, A. E., Stepanov, K. M., & Timina, T. Y. (2017). Crystal-rich inclusions in spinels from calciphyres of Tazheran massif (Western Baikal region, Russia). In Magmatism of the Earth and related strategic metal deposits (pp. 271-274).
Zheleznogorsk ⓘ Korshunovskoye iron deposit	[Ludwigite] Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.
Kamchatka Krai Milkovsky District ⓘ Tolbachik Volcanic field	[Ludwigite] M.O. Bulakh, I. V. Pekov, N. N. Koshlyakova, D.Sc. E. G. Sidorov (2021) Ludwigite and Yuanfuliite from Fumarole Exhalations of Tolbachik Volcano (Kamchatka) Notes of the Russian Mineralogical Society 150:67-87 (in Russian)
Great Fissure eruption (Main Fracture) Northern Breakthrough (North Breach) Second scoria cone ⓘ Arsenatnaya fumarole	[Ludwigite] M.O. Bulakh, I. V. Pekov, N. N. Koshlyakova, D.Sc. E. G. Sidorov (2021) Ludwigite and Yuanfuliite from Fumarole Exhalations of Tolbachik Volcano (Kamchatka) Notes of the Russian Mineralogical Society 150:67-87 (in Russian) Bulakh, M.O., Pekov, I.V., Koshlyakova, N.N., Sidorov, E.G. (2021): Ludwigite and yuanfuliite from fumarolic exhalations of the Tolbachik volcano (Kamchatka, Russia). Zapiski RMO (Proceedings of the Russian Mineralogical Society): 150: 67-87. Pekov, Igor V., Koshlyakova, Natalia N., Zubkova, Natalia V., Belakovskiy, Dmitry I., Vigasina, Marina F., Agakhanov, Atali A., Ksenofontov, Dmitry A., Turchkova, Anna G., Britvin, Sergey N., Sidorov, Evgeny G., Pushcharovsky, Dmitry Yu. (2022) A Natural Vanadate–Arsenate Isomorphous Series with Jeffbenite-Type Structure: New Fumarolic Minerals Udinaite, NaMg4(VO4)3, and Arsenudinaite, NaMg4(AsO4)3. Minerals, 12 (7) 850 doi:10.3390/min12070850 Bulakh, M. O., Pekov, I. V., Koshlyakova, N. N., Sidorov, E. G. (2022) Ludwigite and Yuanfuliite from Fumarolic Exhalations of the Tolbachik Volcano, Kamchatka, Russia. Geology of Ore Deposits, 64 (8) 607-621 doi:10.1134/s1075701522080037
Plosky Tolbachik Volcano ⓘ 2012-2013 Fissure Tolbachik Eruption site	[Marinaite] Mineralogical Magazine: 80: 915–922 Chaplygin, I.V., Yudovskaya, M.A., Pekov, I.V., Zubkova, N.V., Britvin, S.N., Vigasina, M.F., Pushcharovsky, D.Y., Belakovskiy, D.I., Griboedova, I.G., Kononkova, N.N. and Rassulov, V.A. (2016): Marinaite, IMA 2016-021. CNMNC Newsletter No. 32, August 2016, page 917
Khabarovsk Krai Dzhugdzhur Ridge ⓘ Gonochan deposit	[Ludwigite] Galuskina, I. O., Kadiyski, M., Armbruster, T., Galuskin, E. V., Pertsev, N. N., Dzierzanowski, P., & Wrzalik, R. (2008). A new natural phase in the system Mg2SiO4Mg2BO3FMg2BO3 (OH): composition, paragenesis and structure of OH-dominant pertsevite. European Journal of Mineralogy, 20(5), 951-964.
Krasnoyarsk Krai Taymyrskiy Autonomous Okrug Taimyr Peninsula Putoran Plateau Noril'sk Noril'sk Cu-Ni deposit Noril'sk-1 Cu-Ni deposit Medvezhyi Ruchei Mine ⓘ Noril'sk I intrusive	[Azoproite] Shevko, A. Y., Kalugin, V. M., Gora, M. P., & Karmanov, N. S. (2019, September). The First Find of Oxyborates in Rocks of the Norilsk-1 Intrusion (Northwestern Siberian Platform). In Doklady Earth Sciences (Vol. 488, No. 1, pp. 1100-1102). Pleiades Publishing.
Primorsky Krai Dalnegorsk Urban District ⓘ Dalnegorsk	[Ludwigite] *Grant, Raymond W., Wilson, Wendell E. (2001) Famous Mineral Localities: Dal'negorsk, Primorskiy Kray, Russia. The Mineralogical Record, 32 (1) 3-30*pp.8-8
Republic of Karelia ⓘ Pitkyaranta mining district (Pitkäranta mining district)	[Ludwigite] Aleksandrov, S. M., & Troneva, M. A. (2009). Composition and genesis of endogenous borates from the Pitkáranta ore field, Karelia. Geochemistry International, 47(9), 914-929. Ivashchenko, V. I., Valkama, M., Sundblad, K., Golubev, A. I., & Alekseev, V. Y. (2011, September). New data on mineralogy and metallogeny of scarns in the Pitkyaranta ore region. In Doklady Earth Sciences (Vol. 440, No. 1, pp. 1307-1311). SP MAIK Nauka/Interperiodica
ⓘ Sakha	[Ludwigite] American Mineralogist 42:582-583
Aldan ⓘ Tayezhnoe Fe-B skarn (Tayozhnoye)	[Ludwigite] USGS Open File Report 2005-1252: 23. Schreyer, W., Pertsev, N.N., Medenbach, O., Burchard, M., and Dettmar, D. (1998) Pseudosinhalite: discovery of the hydrous MgAl-borate as a new mineral in the Tayozhnoye, Siberia, skarn deposit. Contributions to Mineralogy and Petrology: 133: 382-388. Jambor, J.L., Pertsev, N.N., and Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 1195-1198. Seltmann, R., Soloviev, S., Shatov, V., Pirajno, F., Naumov, E., Cherkasov, S. (2010) Metallogeny of Siberia: tectonic, geologic and metallogenic settings of selected significant deposits. Australian Journal of Earth Sciences*, 57 (6). 655-706 doi:10.1080/08120099.2010.505277
ⓘ Chersky Range	[Vonsenite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Polar Yakutia Dogdo River Basin Tas-Khayakhtakh Range ⓘ Titovskoe B deposit	[Ludwigite] Aleksandrov, S.M. (1998): Geochemistry of skarn and ore formation in dolomites. VSP (Utrecht, Tokyo), 300 pp. Rudnev, V.V., Chukanov, N.V., Nechelyustov, G.N., Yamnova, N.A. (2007): Hydroxylborite, Mg3(BO3)(OH)3, a new mineral, and the isomorphous fluoborite-hydroxylborite series. Proceedings of the Russian Mineralogical Society, 136(1), 69-82. Seltmann, R., Soloviev, S., Shatov, V., Pirajno, F., Naumov, E., Cherkasov, S. (2010) Metallogeny of Siberia: tectonic, geologic and metallogenic settings of selected significant deposits. Australian Journal of Earth Sciences*, 57 (6). 655-706 doi:10.1080/08120099.2010.505277
Izvestkovyi Stream ⓘ Snezhnoe B ore occurrence	[Azoproite] Galuskin, E., Pertsev, N.N. analytical data. Galuskina, I.O., Kadiyski, M., Armbruster, T., Galuskin, E.V., Pertsev, N.N., Dzierzanowski, P., Wrzalik, R. (2008) A new natural phase in the system Mg2SiO4-Mg2BO3F-Mg2BO3(OH): composition, paragenesis and structure of OH-dominant pertsevite. European Journal of Mineralogy: 20: 951-964.
ⓘ Nalednoe B oreoccurrence	[Ludwigite] Pavel M. Kartashov data
Verkhoyansk District Yana River Basin Dogdo river ⓘ Kebirnin'ya creek (Nalednoye)	[Ludwigite] W. Schreyer et al. (2003) Eur. Journ. Mineral. 15, 1007-1018
Yamalo-Nenets Autonomous Okrug Shuryshkarskiy District Voikar-Syninskiy ultrabasite complex ⓘ Malaya Kharamatalou river (left bank)	[Savelievaite] Mineralogical Magazine: 85, https://doi.org.10.1180/mgm.2021.74 Pekov, I.V., Vakhrusheva, N.V., Zubkova, N.V., Yapaskurt, V.O., Shelukhina, Y.S., Erokhin, Y.V., Bulakh, M.O., Britvin, S.N., Pushcharovsky, D.Y. (2021): Savelievaite, IMA 2021-051. CNMNC Newsletter 63
Zabaykalsky Krai Gazimuro-Zavodsky District ⓘ Kultuma Deposit	[Ludwigite] Kovalev, K. R., Kalinin, Y. A., Turkina, O. M., Gimon, V. O., & Abramov, B. N. (2019). Kultuminskoe gold–copper–iron–skarn deposit (Eastern Transbaikalia, Russia): Petrogeochemical features of magmatism and ore-forming processes. Russian Geology and Geophysics, 60(6), 583-601.

Slovakia
Banská Bystrica Region Banská Štiavnica District Vysoká ⓘ Zlatno	[Azoproite] Bilohuščin, V., & Uher, P. (2016). Ludwigite-group minerals and szaibelyite: rare borate minerals from Vysoká–Zlatno skarn, Štiavnica stratovolcano, Slovakia. Geology, Geophysics and Environment, 42(1), 59-59.

South Africa
Mpumalanga Ehlanzeni District Municipality Mbombela Local Municipality Barberton ⓘ Bon Accord Ni deposit	[Bonaccordite] De Waal, S.A., Viljoen, E.A., Calk, L.C. (1974) Nickel minerals from Barberton, South Africa: VII. Bonaccordite, the nickel analogue of ludwigite. Transactions of the Geological Society of South Africa: 77: 375-375. Fleischer, M., Cabri, L.J. (1976) New mineral names. American Mineralogist: 61: 502-504 (502). *Nickel, Ernest H., Nichols, Monte C. (1991) Mineral Reference Manual. Van Nostrand Reinhold, New York.*

Spain
Andalusia Málaga Igualeja ⓘ El Robledal Mine (Cañuelo skarn)	[Ludwigite] Curras, J., Torres-Ruiz, J. (1992) El Skarn magnésico de magnetita-ludwigita del Cañuelo (Cordillras Béticas Occidentales). Boletín de la Sociedad Española de Mineralogía, 15:1, 319-322 (in Spanish). González-Pérez, Igor, Isabel Fanlo, Gonzalo Ares, Fernando Gervilla, José María González-Jiménez, Antonio Acosta-Vigil, and Enrique Arranz. (2023) "The Unconventional Peridotite-Related Mg-Fe-B Skarn of the El Robledal, SE Spain" Minerals 13, no. 3: 300. https://doi.org/10.3390/min13030300
Extremadura Badajoz Burguillos del Cerro ⓘ Monchi Mine	[Vonsenite] Sanabria, R. and Calvo, M. (2002). Los yacimientos de magnetita de Burguillos del Cerro. Revista de Minerales, 2 (3), 4-25
Murcia Cartagena La Aljorra ⓘ La Aljorra Quarries	[Azoproite] in the collection of Christof Schäfer

Sweden
Dalarna County Falun Svärdsjö ⓘ Sjö mine	[Ludwigite]
Hedemora ⓘ Ryllshyttan	[Ludwigite] No reference listed
ⓘ Stålbo	[Ludwigite]
Stockholm County Norrtälje Söderby-Karl ⓘ Maria mine	[Ludwigite] No reference listed
Stabby ore field ⓘ Slotts Mine	[Ludwigite] Stenberg, Tommy (2005) Roslagsexkursionen. Berg & Mineral. Medlemstidning för Stockholms Amatörgeologiska Sällskap, 15 (47) 6-9.
ⓘ Stabbygruvan	[Ludwigite] Appel, P.W.U. and Brigatti, M. F. (1999): Ludwigite from central Sweden: new data and crystal structure refinement. Mineralogical Magazine. 63(4),511-518
Värmland County Filipstad Långban Ore District ⓘ Långban Mine	[Fredrikssonite] P. Dunn Dunn, P.J., Peacor, D.R., Simmons, W.B., Newbury, D. (1983) Fredrikssonite, a new member of the pinakiolite group, from Långban, Sweden. Geologiska Föreningens i Stockholm Förhandlingar: 105: 335-340. Dunn, P.J., Chao, G.Y., Fitzpatrick, J.J., Langley, R.H., Fleischer, M., Zilczer, J.A. (1986) New mineral names. American Mineralogist: 71: 227-232. *Holtstam, Dan, Langhof, Jörgen - Eds.* (1999) Långban - The mines, their minerals, geology and explorers. Raster Förlag; Swedish Museum of Natural History, Stockholm. p.1-216.**
ⓘ Garden dump	[Fredrikssonite] *(2012) Exkursion till Värmland 17-20 Maj 2012. Berg & Mineral. Medlemstidning för Stockholms Amatörgeologiska Sällskap, 22 (70) 7-9*
Nordmark mining district Jakobsberg ore field ⓘ Jakobsberg Mine	[Fredrikssonite] K.Gatedal
Nordmark Odal Field ⓘ Storgruvan	[Ludwigite] Knut Edvard Larsen collection # 3913 (visually identified, ex- H. Fylling collection))
Persberg ⓘ Bergmästar Mine	[Ludwigite] Kjell Gatedal collection and identification
Persberg ore district ⓘ Gåsgruvan ore field	[Ludwigite] Sandström, F., Lorin, T. & Strand, U. (2009): Geologi och mineralogi i Gåsgruvefältet, Filipstad. Litofilen. 26 (2): 16-38
ⓘ Gåsgruvan	[Ludwigite] Kjell Gatedal collection and identification
ⓘ Gåsgruvan Quarry	[Ludwigite]
Västmanland County ⓘ Norberg	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Häste ore field ⓘ Tallgruvan	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Sala Municipality Jugansbo ⓘ Delbo prospect	[Ludwigite] *Bjernulf, Erik, Johansson, Jerry (2021) SAGS exkursion til Saladamm 23 maj. Berg & Mineral. Medlemstidning för Stockholms Amatörgeologiska Sällskap, 31 (102) 5-7*

UK
Scotland Highland Eilean á Chèo Isle of Skye Broadford Kilchrist ⓘ Marble quarries	[Ludwigite]
Torrin ⓘ Camas Malag	[Ludwigite] *Livingstone, Alec (2002) Minerals of Scotland* - Past and Present. National Museums of Scotland Publishing Ltd., Edinburgh.**

USA
Alaska Nome Census Area Port Clarence Mining District ⓘ Brooks Mountain	[Azoproite] Aleksandrov, S. M., & Troneva, M. A. (2008). Heterovalent isomorphism in the magnesium-iron borates. Geochemistry International, 46(8), 800.
York Range ⓘ Ear Mountain	[Ludwigite] www.excaliburmineral.com.
Arizona Pima County Mount Bigelow Leatherwood Mine group (Apache group) ⓘ Control Mine area (Geesman Mine group area)	[Ludwigite] *Anthony, John W., Williams, Sidney A., Bideaux, Richard A., Grant, Raymond W. (1995) Mineralogy of Arizona* (3rd ed.) University of Arizona Press, Tucson, AZ.**
California Fresno County Kaiser Wilderness area ⓘ Twin Lakes Limestone deposit	[Ludwigite] Van Nostrand Reinholt Press: 236, 237. Vlisidid, A.C. and Schaller, W.T. (1974) The identity of paigeite with vonsenite, and chemical analysis of vonsenite, ludwigite and hulsite. Neues Jahrbuch für Mineralogie, Monatshefte 1974(3-4): 95-105 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
ⓘ Unnamed Skarn occurrence [1]	[Ludwigite] Erd, R.C., Foord, E.E. (1988) Chestermanite, a new member of the ludwigite-pinakiolite group from Fresno County, California. The Canadian Mineralogist: 26: 911-916.
Twin Lakes Kaiser Ridge ⓘ Unnamed Borate occurrence [1]	[Ludwigite] Van Nostrand Reinholt Press: 236. Chesterman, C.W. (1959), Ludwigite from Fresno County, California (abstract): Geological Society of America Bulletin: 70: 1712-1713 Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 246 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
Kern County Tehachapi Mountains ⓘ Gorman District	[Ludwigite] Page, Lincoln Ridler (1946), Contact metamorphic deposits of Cassiterite in California: (abstract) Geological Society of America Bulletin 56: 1187 […American Mineralogist: 31: 202 (1946)] Wiese, J.H. & L.R. Page (1946), Tin deposits of the Gorman District, Kern County, California: California Division Mines Report 42: 50 Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 246, 330.
Lebec Tejon Tin project (Gorman Tin project) ⓘ Gray Eagle prospect (Gray Eagle Discovery prospect; Gray Eagle claim)	[Ludwigite] *(2005) Mineral Resources Data System (MRDS), US Geological Survey.*
ⓘ Hogan-Mallery Tin Mine (Hogan-Mallery Meek Mine; Hogan Tin Mine; Meeke Tin Mine; Meeke-Hogan Tin Mine; Meeke-Hogan Mine)	[Ludwigite] Van Nostrand Reinholt Press: 236. Page, Lincoln Ridler (1946), Contact metamorphic deposits of Cassiterite in California: (abstract) Geological Society of America Bulletin 56: 1187 […American Mineralogist (1946): 31: 202] Wiese, J.H. & L.R. Page (1946), Tin deposits of the Gorman district, Kern County, California: California Division Mines Report 42: 42(1): 36 Vlisidid, A.C. and Schaller, W.T. (1974) The identity of paigeite with vonsenite, and chemical analysis of vonsenite, ludwigite and hulsite. Neues Jahrbuch für Mineralogie, Monatshefte 1974(3-4): 99 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.* *(2005) Mineral Resources Data System (MRDS), US Geological Survey.*
Monterey County Gabilan Range ⓘ Unnamed Borate occurrence [1]	[Ludwigite] Van Nostrand Reinholt Press: 236. Chesterman, C.W. (1966a), Vonsenite of Monterey County, California: American Mineralogist: 51: 261-262 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
Riverside County Crestmore ⓘ Crestmore quarries	[Vonsenite] [micromounts@yahoogroups.com]
Sky Blue Hill ⓘ Commercial Quarry	[Ludwigite] Woodford, A.O., Crippen, R.A. and Garner, K.B. (1941) Section across Commercial Quarry, Crestmore, California. American Mineralogist, 26, 351-381. Schaller, Waldemar Theodore and Calomeris Vlisidis, Angelina (1961) The composition of aluminian Ludwigite from Crestmore, California. American Mineralogist, 46, 335-339. DeVito, F., Parcel, R. T., Jefferson, G. T., & Elders, W. A. (1971). Contact metamorphic minerals at Crestmore quarry, Riverside, California. Geological Excursions in Southern California: Riverside, California, University California. Campus Museum Contribution, 1, 94-125.
ⓘ Lone Star Quarry	[Ludwigite] Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmore, California. American Mineralogist: 26: 351-381 (366).
ⓘ Wet Weather Quarry	[Ludwigite] Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmore, California. American Mineralogist: 26: 351-381 (366).
Jurupa Valley Jurupa Mountains ⓘ Jensen Quarry (Oak Quarry)	[Ludwigite] Van Nostrand Reinholt Press: 236 Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles: 32 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.* Devito, F. and Ordway, A. (1984), The Jensen Quarry, Riverside County, California. Mineralogical Record: 15(5): 273-290.
Riverside ⓘ New City Quarry (Victoria Avenue quarry)	[Ludwigite] Am. Min 26:351-381, 1941
ⓘ Old City Quarry (City Quarry; North Hill Quarry; Quarry Hill; Fairmount)	[Vonsenite] a preliminary note on a new mineral from Riverside, California, American Mineralogist: 5: 141-143 Van Nostrand Reinholt Press: 236. Eakle, A.S. (1920), Vonsenite Vlisidid, A.C. and Schaller, W.T. (1974) The identity of paigeite with vonsenite, and chemical analysis of vonsenite, ludwigite and hulsite. Neues Jahrbuch für Mineralogie, Monatshefte 1974(3-4): 95-105 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
San Bernardino County Bloomington ⓘ Henshaw Quarry	[Ludwigite] Van Nostrand Reinholt Press: 237. Cooney, R.L. (1956), The mineralogy of the Jensen and Henshaw quarries near Riverside, California: Unpublished Master’s thesis, University of California at Los Angeles: 32 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
Cave Mountain Cave Canyon District ⓘ Cave Canyon Mine (Cave Canyon Iron Ore deposits; Cave Canyon Iron deposit; Baxter; Basin)	[Ludwigite] Van Nostrand Reinholt Press: 237. Lamey, Carl Arthur (1961), Contact metasomatic iron deposits of California: Geological Society of America Bulletin: 72: 673 Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 246 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
Lava Bed Mountains Lava Beds District (Newberry District) Iron Ridge ⓘ Ebony Iron deposit (Lava Bed deposit; Ebony)	[Ludwigite] Van Nostrand Reinholt Press: 237. Lamey, Carl Arthur (1961), Contact metasomatic iron deposits of California: Geological Society of America Bulletin: 72: 673 *Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.*
Idaho Lemhi County ⓘ Spring Mountain Mining District	[Ludwigite] Micro Probe, Nov 2001, pages 16-19
ⓘ Bruce Canyon	[Ludwigite] *Ream, Lanny R. (2004) Idaho Minerals* (2nd ed.) L. R. Ream Publishing, Coeur d'Alene, ID.**
ⓘ Bruce Estate deposit (Bruce - Stone Copper Group)	[Ludwigite] *Ream, Lanny R. (2004) Idaho Minerals* (2nd ed.) L. R. Ream Publishing, Coeur d'Alene, ID.**
Quartzite Canyon ⓘ Unnamed skarn	[Ludwigite] *Ream, Lanny R. (2004) Idaho Minerals* (2nd ed.) L. R. Ream Publishing, Coeur d'Alene, ID.**
Michigan Keweenaw County ⓘ Eagle Harbor	[Vonsenite] *Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan* (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University, Houghton, MI. 252pp.**
Montana Deer Lodge County Georgetown Mining District (Southern Cross Mining District; Cable Mining District) ⓘ Pomeroy Mine	[Ludwigite] Rob Lavinsky specimen
ⓘ Southern Cross Mine	[Ludwigite] ex-Bosse collection (1960s-70s)
Granite County Philipsburg Mining District (Flint Creek Mining District) Franklin Hill Iron Deposit (Tarriff; Courtney Manganiferous Iron Deposit; Courtney Prospect) ⓘ Redemption Iron Mine	[Ludwigite] Gobla, M.J. (2012) Montana mineral locality index. Rocks & Minerals, 87, #3, 208-240.
ⓘ Philipsburg	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Lewis and Clark County Boulder Mountains Area ⓘ Colorado Gulch	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Nevada Elko County Railroad Mining District Alladin group Nevada Bunker Hill Mines ⓘ Grey Eagle Mine (Lee Mine; Helen M. claims; Lucky May Mine)	[Ludwigite] Gillerman, V. S. (1982). Tungsten and copper skarns of the Railroad mining district, Nevada. University of California, Berkeley. PhD thesis
Lincoln County Bristol and Jackrabbit Mining Districts ⓘ Unnamed copper prospect	[Ludwigite] *Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication* 31. Nevada Bureau of Mines and Geology**
ⓘ Pioche Mining District	[Ludwigite] Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
ⓘ Blind Mountain Prospect	[Ludwigite] American Mineralogist 10:137-139
Lyon County Singatse Range Yerington Mining District Ludwig ⓘ Ludwig Gypsum Mine	[Ludwigite] *Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication* 31. Nevada Bureau of Mines and Geology**
Mineral County Bell Mining District ⓘ Blue Bird nos. 1 - 3 Mines	[Ludwigite] Martin Jensen (2011) Minerals of the Blue Bird Mine, Mineral County, Nevada. Mineral News, 27, #8, 1-6.
ⓘ Unnamed prospect	[Ludwigite] *Castor, Stephen B., Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication* 31. Nevada Bureau of Mines and Geology**
New York ⓘ St. Lawrence County	[Vonsenite] American Mineralogist (1960): 45: 439.
Magnetite Mining District Clifton ⓘ Clifton Mines	[Vonsenite] George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.
ⓘ Jayville mine	[Vonsenite] NY State Museum spec. no. 13889 B.F. Leonard and A.F. Buddington (1964) Ore deposits of the St. Lawrence County magnetite district, northwest Adirondacks, New York. USGS Professional Paper 377 George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.
Utah Beaver County Beaver Lake Mountains Beaver Lake Mining District West Spring ⓘ Unnamed prospect	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
Salt Lake County ⓘ Alta Stock	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey** Hanson, S.L., A.U. Falster & W.B. Simmons (2014), Contact Metamorphic Minerals from the Alta Aureole, Central Wasatch Mountains, Utah, a presentation before the 41st. Rochester Mineralogical Symposium, April 25, 2014.
Big Cottonwood Mining District Brighton ⓘ Great Western Mine Group	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
ⓘ Big Cottonwood Mine	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
ⓘ Mountain Lake Mine (Jack Mine)	[Ludwigite] Calkins, F. C. Butler, B. S. Heikes, V. C. (1943) Geology and ore deposits of the Cottonwood-American Fork area, Utah, with sections on history and production. USGS Professional Paper: 201 Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
ⓘ Mountain View Mine	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
Little Cottonwood Mining District Alta ⓘ Albian Basin	[Ludwigite] Woodford, D. T., Sisson, V. B., & Leeman, W. P. (2001). Boron metasomatism of the Alta stock contact aureole, Utah: Evidence from borates, mineral chemistry, and geochemistry. American Mineralogist, 86(4), 513-533.
ⓘ Michigan-Utah Mine	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
ⓘ Quincy Mine	[Ludwigite] Calkins, F. C. Butler, B. S. Heikes, V. C. (1943) Geology and ore deposits of the Cottonwood-American Fork area, Utah, with sections on history and production. USGS Professional Paper: 201
ⓘ South Columbus Prospect	[Ludwigite] Calkins, F. C. Butler, B. S. Heikes, V. C. (1943) Geology and ore deposits of the Cottonwood-American Fork area, Utah, with sections on history and production. USGS Professional Paper: 201
ⓘ South Hecla Mine	[Ludwigite] *Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin* 117. Utah Geological and Mineral Survey**
Wasatch County ⓘ Clayton Peak	[Ludwigite] Field, V.W. (1917) American Mineralogist, 2, #7, 92-93
Washington Snohomish County Darrington Mining District Jumbo Mountain ⓘ Jumbo Mountain Nickel deposit	[Ludwigite] Minerals of Washington, Bart Cannon, 1975 Aleksandrov, S. M. (2005). Genesis and Composition of Borate and Sulfide Mineralization in the Mount Jumbo Dunite, Snohomish County, Washington, United States. Geochemistry International, 43(3), 277-289.
Stevens County Deer Trail Mining District ⓘ Read Mine	[Ludwigite] Huntting, M. (1956): Inventory of Washington Minerals, Part II, Metallic Minerals, Vol. 1 Cannon, B. (1975): Minerals of Washington, p.48,72,75 *Derkey, Robert E., Joseph, Nancy L., Lasmanis, Raymond (1990, November) Metal Mines of Washington - Preliminary Report. Open File Report* 90-18. Washington Division of Geology and Earth Resources**

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