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About HydroxycalciopyrochloreHide

Brownish-black, greenish-black and black
5 - 6
Specific Gravity:
Crystal System:
The Ca analogue of hydroxymanganopyrochlore and hydroxyplumbopyrochlore. The OH analogue of fluorcalciopyrochlore. Chemically related to charleshatchettite and 'Unnamed (MSH UK-56)'.

Classification of HydroxycalciopyrochloreHide

Approval year:
First published:

Physical Properties of HydroxycalciopyrochloreHide

Brownish-black, greenish-black and black
Colors on fresh sections
brown streak
5 - 6 on Mohs scale
VHN100=572 - Vickers
None Observed
None observed
5.10(3) g/cm3 (Measured)    5.15 g/cm3 (Calculated)
Measured by hydrostatic weighing

Chemical Properties of HydroxycalciopyrochloreHide

Common Impurities:

Chemical AnalysisHide

Empirical formulas:
Sample IDEmpirical Formula

Crystallography of HydroxycalciopyrochloreHide

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Cell Parameters:
a = 10.381(4) Å
Unit Cell V:
1118.7 ų
Mostly as octahedra, and less often as dodecahedra and tetrahexahedra or combinations thereof. Some occur with an allotriomorphic habit with a thick triangular tabular form.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020233HydroxycalciopyrochloreYang G, Li G, Xiong M, Pan B, Yan C (2014) Hydroxycalciopyrochlore, a new mineral species from Sichuan, China Acta Geologica Sinica 88 748-7532014Maoniuping mine, Mianning County, Xichang prefecture, Sichuan Province, China0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.9657 Å(100)
2.569 Å(18)
1.8142 Å(34)
1.5463 Å(21)
2.5688 Å(18)

Type Occurrence of HydroxycalciopyrochloreHide

Place of Conservation of Type Material:
China University of Geosciences, Beijng,China, catalogue number M595-22
Geological Setting of Type Material:
Alkali feldspar granite rare-earth ore deposit (26–27 Ma).
Associated Minerals at Type Locality:

Synonyms of HydroxycalciopyrochloreHide

Relationship of Hydroxycalciopyrochlore to other SpeciesHide

Other Members of this group:
Cesiokenopyrochlore◻Nb2(O,OH)6(Cs,◻) Iso. m3m (4/m 3 2/m) : Fd3m
Fluorcalciopyrochlore(Ca,Na)2(Nb, Ti)2O6FIso.
FluorhydropyrochloreA possible new species (See discussion in Atencio et al.
Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
Hydrokenopyrochlore(◻,x)2Nb2O6(H2O,Cs)Iso. m3m (4/m 3 2/m) : Fd3m
Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxykenopyrochlore(◻,Ce,Ba)2(Nb,Ti)2O6(OH,F)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxymanganopyrochlore(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) Iso. m3 (2/m 3)
Hydroxynatropyrochlore(Na,Ca,Ce)2Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxyplumbopyrochlore (Pb1.50.5)Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
OxycalciopyrochloreCa2Nb2O6OIso. m3m (4/m 3 2/m) : Fd3m
Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Hydroxycalciopyrochlore associated with Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
2 photos of Hydroxycalciopyrochlore associated with Monazite-(Ce)Ce(PO4)

Other InformationHide

Dissolves in H3PO4; does not dissolve in HCl and HNO3
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for HydroxycalciopyrochloreHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hogarth, D. (1961) A study of pyrochlore and betafite. Canadian Mineralogist: 6: 610-633.
Bonazzi, P., Bindi, L., Zoppi, M., Capitani, G.C., and Olmi, F. (2006) Single-crystal diffraction and transmission electron microscopy studies of "silicified" pyrochlore from Narssârssuk, Julianehaab district, Greenland. American Mineralogist: 91: 794-801 [as pyrochlore].
Yang, G., Li, G., Xiong, M., Pan, B., and Yan, C. (2011) Hydroxycalciopyrochlore, IMA 2011-026. CNMNC Newsletter no. 10, October 2011, page 2554.
Christy, A.G. and Atencio, D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine: 77: 13-20.
Yang, G., Li, G., Xiong, M., Pan, B., and Yan C. (2014) Hydroxycalciopyrochlore, a new mineral species from Sichuan, China. Acta Geologica Sinica - English Edition: 88: 748–753.

Internet Links for HydroxycalciopyrochloreHide

Localities for HydroxycalciopyrochloreHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Huíla Province
    • Quilengues
Amores-Casals, S., Melgarejo, J. C., Bambi, A., Gonçalves, A. O., Morais, E. A., Manuel, J., ... & Molist, J. M. (2019). Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in Carbonatites—The Bonga Complex (Angola). Minerals, 9(10), 601.
  • Newfoundland and Labrador
    • Labrador
      • Seal Lake alkaline complex (Letitia Lake)
Pavel M. Kartashov analytical data (2013), Photo id 540666
  • Ontario
    • Haliburton County
      • Lutterworth Township
Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist, v. 6, p. 610-633.
    • Hastings County
      • Monteagle Township
Bideaux, R. (1997), v. 3, p. 457.; Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist: 6 : 610-633. Masson, S.L. and Gordon J.B. (1981) Radioactive Mineral Deposits of the Pembroke-Renfrew Area; Ontario Geological Survey Mineral Deposit Circular 23.
  • Québec
    • Outaouais
Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist, v. 6, p. 610-633.
China (TL)
  • Sichuan
    • Liangshan Yi
      • Mianning County
Yang, G., Li, G., Xiong, M., Pan, B. and Yan, C. (2011): Hydroxycalciopyrochlore, IMA 2011-026. CNMNC Newsletter no. 10, October 2011, page 2554; Yang, G., Li, G., Xiong, M., Pan, B., Yan C. (2014): Hydroxycalciopyrochlore, a new mineral species from Sichuan, China. Acta Geologica Sinica - English Edition, 88, 748–753.
  • Xinjiang
    • Akesu Prefecture (Aksu Prefecture; Aqsu Prefecture)
      • Baicheng Co. (Bay Co.)
Jingwu Yin, Xingkun Shao, Haitao Yang, Tingxian Piao, Haiming Xu, and Jun Wang (2013): Mineral Deposits 32(2), 337-352
Czech Republic
  • South Bohemian Region
    • Český Krumlov District
      • Frymburk
        • Černá v Pošumaví (Schwarzbach im Böhmerwald)
          • Bližná
Drábek;, M., Frýda J., Šarbach M., Skála, R. (2017): Hydroxycalciopyrochlore from a regionally metamorphic marble at Bližná, Southwestern Czech Republic. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry, 194, 49-59.
  • Southwest Finland
    • Laitila
Pavel M. Kartashov analytical data 2019, Joel Dyer collection
  • Rhineland-Palatinate
    • Mayen-Koblenz District
      • Mendig
        • Mendig
Zubkova. N.V., Chikanov, N.V., Pekov, I.V., Schäfer, Ch.J., Yapaskurt, V.O., Pushcharovsky, D.Yu. (2015): Lanthanum-rich Fluorbritholithe-(Ce) from young alkaline volcanic rock of Eifel (Germany) and ist crystal structure. Cation ordering in Briotholites. Doklady Earth Sciences, Vol. 464, No. 2, pp. 199-202
  • Kujalleq
    • Igaliku
      • Narsaarsuk Plateau
Bonazzi, P., Bindi, L., Zoppi, M.,Capitani, G. C. & OLmi, F.(2006): Single-crystal diffraction and transmission electron microscopy studies of "silicified" pyrochlore from Narssârssuk, Julianehaab district, Greenland. American Mineralogist: 91:794-801; Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist: 48: 673-698.
  • Chelyabinsk Oblast
Chukanov, N.V. (2014): Infrared spectra of mineral species. Extended library. Springer, Dordrecht 2014., p.496
Pavel M. Kartashov analytical data of 2018
  • Murmansk Oblast
    • Northern Karelia
      • Vuoriyarvi alkaline-ultrabasic massif
Kozlov, E.; Fomina, E.; Sidorov, M.; Shilovskikh, V.; Bocharov, V.; Chernyavsky, A.; Huber, M. (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals 10, 73.
  • Košice Region
    • Rožňava District
      • Dobšiná
        • Dobšiná mining district
Uher P., Bačík P., Števko M., Chládek Š., Fridrichová J. (2018): Elbaite-bearing, Nb-Ta-rich granitic pegmatite from Dobšiná, Gemeric Unit, Eastern Slovakia: the first documented occurrence in the Western Carpathians. Joint 5th Central-European Mineralogical Conference and 7th Mineral Sciences in the Carpathians Conference, Book of Abstracts, 109.
  • Districts of Republican Subordination
Ефимов А.Ф., Семёнов Е.И., Акрамов А.Н., Дусматов В.Д., Любомилова В.Г. (1980) Минералы группы пирохлора из щелочных пород Восточного Каратегина (Южный Тянь-Шань), - Доклады АН Тадж. ССР, 1980, т.XXIII, №3, с. 158-161.
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Franklin
          • Franklin Mine
Chris O'Neill
矿物 and/or 产地  
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