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Kegelite

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04322400014965863866684.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
02378740014950456388094.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00486970014950456384631.jpg
Kegelite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
08796140014961265051960.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
02378740014950456388094.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00486970014950456384631.jpg
Kegelite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
04322400014965863866684.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
02378740014950456388094.jpg
Kegelite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
Hide all sections | Show all sections

About KegeliteHide

08646240015098784865122.jpg
Friedrich W. Kegel
Formula:
Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
Colour:
Colorless
Specific Gravity:
4.5
Crystal System:
Monoclinic
Name:
Named in 1975 by Olaf Medenbach and Karl Schmetzer in honor of Friedrich Wilhelm Kegel [1874 Hettstedt, eastern Harz, Mansfeld-Südharz, Sachsen-Anhalt, Germany - 8 August, 1948 Landschlacht, Münsterlingen, Kreuzlingen, Thurgau, Switzerland], Director of mining operations (1922-1938) at Tsumeb, Namibia.
This page provides mineralogical data about Kegelite.


Classification of KegeliteHide

IMA status:
Approved
IMA status notes:
Redefined by the IMA
First published:
1975
Approval history:
Approved by IMA (IMA 1974-042) as Pb12(Zn,Fe)2Al4Si11S4O54
1990: Redefined by IMA as Pb4Al8Si8(SO4)2(CO3)4(OH)8O20, monoclinic (Dunn et al. 1990)
Strunz 8th ed.:
8/H.09-70
Nickel-Strunz 10th (pending) ed.:
9.EC.80

9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
Dana 8th ed.:
71.5.1.1

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
5 : Sheets of 6-membered rings with other anions
Hey's CIM Ref.:
17.10.27

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Physical Properties of KegeliteHide

Transparency:
Transparent, Translucent
Colour:
Colorless
Streak:
White
Tenacity:
Flexible
Cleavage:
Perfect
{100}
Density:
4.5 g/cm3 (Measured)    4.76 g/cm3 (Calculated)

Optical Data of KegeliteHide

Type:
Biaxial (-)
Dispersion:
r > v

Chemical Properties of KegeliteHide

Formula:
Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8
IMA Formula:
Pb4Al2Si4O10(SO4)(CO3)2(OH)4
Elements listed:
Al, C, H, O, Pb, S, Si - search for minerals with similar chemistry
Common Impurities:
Cu,H2O

Crystallography of KegeliteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 21.04(1) Å, b = 15.55(1) Å, c = 8.986(6) Å
β = 91.0(1)°
Ratio:
a:b:c = 1.353 : 1 : 0.578
Unit Cell V:
2,939.52 ų (Calculated from Unit Cell)
Z:
3
Comment:
A2/m, A2, or Am

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
21.0 Å(100)
10.5 Å(20)
7.01 Å(50)
4.49 Å(30)
4.39 Å(20b)
4.09 Å(10)
3.82 Å(80)
3.74 Å(40)
3.51 Å(15)
3.45 Å(20)
3.006 Å(50)
2.934 Å(20)
2.815 Å(10)
2.747 Å(10)
2.591 Å(90)
2.531 Å(10)
2.339 Å(50)
2.242 Å(30)
2.156 Å(15)
2.085 Å(10)
Comments:
Dunn et al. 1990, redefinition.

Type Occurrence of KegeliteHide

Type Locality:
ⓘ Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
Geological Setting of Type Material:
Oxidation zone hydrothermal deposit
Associated Minerals at Type Locality:
QuartzGalena
Reference:
Medenbach, O., Schmetzer, K. (1975) Kegelite - ein neues Bleisilikat von Tsumeb. Naturwissenschaften: 62: 137.

Other Language Names for KegeliteHide

German:Kegelit
Spanish:Kegelita

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Kegelite associated with SideriteFeCO3
4 photos of Kegelite associated with AlamositePbSiO3
1 photo of Kegelite associated with MelanotekitePb2Fe3+2(Si2O7)O2
1 photo of Kegelite associated with WulfenitePb(MoO4)

Related Minerals - Nickel-Strunz GroupingHide

9.EC.BalestraiteKLi2V5+Si4O12Mon. 2 : B2
9.EC.05MinnesotaiteFe2+3Si4O10(OH)2Tric. 1 : P1
9.EC.05TalcMg3Si4O10(OH)2Tric. 1 : P1
9.EC.05WillemseiteNi3Si4O10(OH)2Mon.
9.EC.9.EC.VoloshiniteRb(LiAl1.5◻1.5)(Al0.5Si3.5)O10F2Mon. 2/m : B2/b
9.EC.10FerripyrophylliteFe3+Si2O5(OH)Mon.
9.EC.10PyrophylliteAl2Si4O10(OH)2Tric. 1
9.EC.15BoromuscoviteKAl2(BSi3O10)(OH)2Mon.
9.EC.15CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15Chernykhite(Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2Mon.
9.EC.15Montdorite(K,Na)2(Fe2+,Mn2+,Mg)5(Si4O10)2(OH,F)4Mon. 2/m : B2/m
9.EC.15MuscoviteKAl2(AlSi3O10)(OH)2Mon. 2/m : B2/b
9.EC.15NanpingiteCsAl2(AlSi3O10)(OH,F)2Mon.
9.EC.15ParagoniteNaAl2(AlSi3O10)(OH)2Mon.
9.EC.15RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2Mon. 2/m : B2/b
9.EC.15Tobelite(NH4,K)Al2(AlSi3O10)(OH)2Mon.
9.EC.15AluminoceladoniteK(Mg,Fe2+)Al(Si4O10)(OH)2Mon.
9.EC.15ChromphylliteK(Cr,Al)2(AlSi3O10)(OH,F)2Mon. 2/m : B2/b
9.EC.15FerroaluminoceladoniteK(Fe2+,Mg)(Al,Fe3+)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15FerroceladoniteK(Fe2+,Mg)(Fe3+,Al)(Si4O10)(OH)2Mon. 2/m : B2/m
9.EC.15ChromceladoniteK(Mg,Fe2+)(Cr,Al)(Si4O10)(OH)2Mon.
9.EC.15TainioliteKLiMg2(Si4O10)F2Mon.
9.EC.15Ganterite(Ba,Na,K)(Al,Mg)2(AlSi3O10)(OH)2Mon.
9.EC.20AnniteKFe2+3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20EphesiteNaLiAl2(Al2Si2O10)(OH)2Tric.
9.EC.20HendricksiteKZn3(Si3Al)O10(OH)2Mon. 2/m : B2/m
9.EC.20Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2Mon.
9.EC.20NorrishiteKLiMn3+2(Si4O10)O2Mon. 2/m : B2/m
9.EC.20PhlogopiteKMg3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20PolylithioniteKLi2Al(Si4O10)(F,OH)2Mon. 2/m : B2/b
9.EC.20PreiswerkiteNaMg2Al(Al2Si2O10)(OH)2Mon.
9.EC.20SiderophylliteKFe2+2Al(Al2Si2O10)(OH)2Mon.
9.EC.20TetraferriphlogopiteKMg3(Fe3+Si3O10)(OH,F)2
9.EC.20FluorotetraferriphlogopiteKMg3(Fe3+Si3O10)F2Mon. 2/m : B2/m
9.EC.20Wonesite(Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4Mon. 2/m : B2/m
9.EC.20EastoniteKMg2Al(Al2Si2O10)(OH)2Mon.
9.EC.20TetraferrianniteKFe2+3(Si3Fe3+)O10(OH)2Mon.
9.EC.20TrilithioniteK(Li1.5Al1.5)(AlSi3O10)(F,OH)2Mon. 2/m : B2/b
9.EC.20FluoranniteKFe2+3(Si3Al)O10F2Mon.
9.EC.20ShirokshiniteKNaMg2(Si4O10)F2Mon. 2/m : B2/m
9.EC.20ShirozuliteKMn2+3(Si3Al)O10(OH)2Mon. 2/m : B2/m
9.EC.20SokolovaiteCsLi2Al(Si4O10)F2Mon.
9.EC.20AspidoliteNaMg3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20FluorophlogopiteKMg3(Si3Al)O10F2Mon. 2/m : B2/m
9.EC.20UM2004-49-SiO:AlCsFHKLi(Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2
9.EC.20Suhailite(NH4)Fe2+3(AlSi3O10)(OH)2Mon. 2/m : B2/m
9.EC.20YangzhumingiteKMg2.5(Si4O10)F2Mon. 2/m : B2/m
9.EC.20OrloviteKLi2Ti(Si4O10)OFMon. 2 : B2
9.EC.20OxyphlogopiteK(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2Mon. 2/m : B2/m
9.EC.30MargariteCaAl2(Al2Si2O10)(OH)2Mon.
9.EC.35Anandite(Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2Mon. 2/m : B2/b
9.EC.35BityiteLiCaAl2(AlBeSi2O10)(OH)2Mon. 2/m : B2/b
9.EC.35ClintoniteCaAlMg2(SiAl3O10)(OH)2Mon. 2/m : B2/m
9.EC.35Kinoshitalite(Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2Mon.
9.EC.35Ferrokinoshitalite(Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2Mon.
9.EC.35Oxykinoshitalite(Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2Mon. 2/m : B2/m
9.EC.35FluorokinoshitaliteBaMg3(Al2Si2O10)F2Mon. 2/m : B2/m
9.EC.40Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2OMon.
9.EC.40Kurumsakite(Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?)Orth.
9.EC.40Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2OMon. 2/m : B2/m
9.EC.40NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2OMon.
9.EC.40VolkonskoiteCa0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.40Yakhontovite(Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2OMon.
9.EC.45HectoriteNa0.3(Mg,Li)3(Si4O10)(F,OH)2Mon.
9.EC.45SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2OMon.
9.EC.45SauconiteNa0.3Zn3((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.45SpadaiteMgSiO2(OH)2 · H2O (?)
9.EC.45Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2Mon.
9.EC.45SwineforditeLi(Al,Li,Mg)4((Si,Al)4O10)2(OH,F)4 · nH2OMon.
9.EC.45ZincsiliteZn3Si4O10(OH)2 · 4H2O (?)Mon.
9.EC.45FerrosaponiteCa0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2OMon.
9.EC.50VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2OMon. 2/m
9.EC.55Baileychlore(Zn,Fe2+,Al,Mg)6(Si,Al)4O10(OH)8Tric. 1
9.EC.55Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8Mon.
9.EC.55ClinochloreMg5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
9.EC.55Cookeite(Al,Li)3Al2(Si,Al)4O10(OH)8Mon. 2/m
9.EC.55FranklinfurnaceiteCa2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8Mon. 2 : B2
9.EC.55Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8Orth.
9.EC.55Nimite(Ni,Mg,Al)6((Si,Al)4O10)(OH)8Mon.
9.EC.55Orthochamosite(Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8
9.EC.55PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
9.EC.55SudoiteMg2Al3(Si3Al)O10)(OH)8Mon.
9.EC.55DonbassiteAl2(Si3Al)O10(OH)2 · Al2.33(OH)6Mon. 2 : B2
9.EC.55GlagoleviteNa(Mg,Al)6(AlSi3O10)(OH,O)8Tric. 1 : P1
9.EC.55BorocookeiteLiAl4(Si3B)O10(OH)8
9.EC.60AliettiteCa0.2Mg6((Si,Al)8O20)(OH)4 · 4H2OMon.
9.EC.60Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2OOrth.
9.EC.60DozyiteMg7Al2(Al2Si4O15)(OH)12Mon.
9.EC.60HydrobiotiteK(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2OMon.
9.EC.60Karpinskite(Ni,Mg)2Si2O5(OH)2 (?)Mon.
9.EC.60KulkeiteMg8Al(AlSi7O20)(OH)10Mon.
9.EC.60LunijianlaiteLi0.7Al6.2(AlSi7O20)(OH,O)10Mon.
9.EC.60Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2OMon.
9.EC.60Saliotite(Li,Na)Al3(AlSi3O10)(OH)5Mon.
9.EC.60TosuditeNa0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2OMon. 2 : B2
9.EC.60BrinrobertsiteNa0.3Al4(Si4O10)2(OH)4 · 3.5 H2OMon.
9.EC.65Macaulayite(Fe,Al)24Si4O43(OH)2Mon.
9.EC.70BurckhardtitePb2(Fe3+Te6+)[AlSi3O8]O6Trig. 3m (3 2/m) : P3 1m
9.EC.75Ferrisurite(Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2OMon.
9.EC.75Surite(Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2Mon.
9.EC.75Niksergievite(Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
17.10.4Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex. 6 : P6
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
17.10.9Delhayelite(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2OOrth.
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
17.10.12Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Trig. 3m : P3 1c
17.10.15Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6 · 2H2OHex.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
17.10.19Ellestadite
17.10.20ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex. 6/m : P63/m
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2OMon. 2/m : B2/m
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(Si,Al)20O39(OH)2](SO4)3 · 0.5H2OHex.
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2Mon.
17.10.30WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3

Other InformationHide

Notes:
Insoluble in HCl
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 KegeliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Medenbach, O., Schmetzer, K. (1975) Kegelite - ein neues Bleisilikat von Tsumeb. Naturwissenschaften: 62: 137. (in German with English abstract)
Fleischer, M., Pabst, A., Mandarino, J.A., Chao, G.Y., Cabri, L.J. (1976) New mineral names. American Mineralogist: 61: 174-186 (175-176).
Medenbach, O., Schmetzer, K. (1976) Kegelite - ein neues Bleisilikat von Tsumeb. Neues Jahrbuch für Mineralogie, Monatshefte: 110-114. (in German)
Fleischer, M., Mandarino, J.A. (1977) New mineral names. American Mineralogist: 62: 173-176 (155).
Dunn, P.J., Braithwaite, R.S.W., Roberts, A.C., and Ramik, R.A. (1990) Kegelite from Tsumeb, Namibia: A redefinition. American Mineralogist: 75: 702-704.
Braithwaite, R.S.W. (1991) Kegelite: infrared spectroscopy and a structural hypothesis. Mineralogical Magazine: 55: 127-134.
Raade, G. (1993) Caledonite and kegelite from Minge, Tune, Østfold. Interne notater 1990 - 1993, Mineralogisk-Geologisk Museum Universitetet i Oslo. Printed by Geologisk Museums Venner, 1993: 164-165.
Neall, T., Green, D.I. (2008) Kegelite, a first British occurrence, from Wanlockhead, Dumfries and Galloway, Scotland. Journal of the Russell Society: 8: 110-111.

Internet Links for KegeliteHide

Localities for KegeliteHide

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.
Australia
 
  • Tasmania
    • West Coast municipality
      • Zeehan district
        • Zeehan mineral field
Bottrill, R.S., Baker, W.E. (2008) A Catalogue of the Minerals of Tasmania. Geological Survey Tasmania Bulletin 73, 254 pages.
Namibia (TL)
 
  • Oshikoto Region
    • Tsumeb
Medenbach, O., Schmetzer, K. (1975) Kegelite - ein neues Bleisilikat von Tsumeb. Naturwissenschaften: 62: 137.; Dunn, P.J., Braithwaite, R.S.W., Roberts, A.C., and Ramik, R.A. (1990) Kegelite from Tsumeb, Namibia: A redefinition. American Mineralogist: 75: 702-704.
Norway
 
  • Østfold
    • Sarpsborg
      • Tune
Raade, G. (1993): Caledonite and kegelite from Minge, Tune, Østfold. Interne notater 1990 - 1993, Mineralogisk-Geologisk Museum Universitetet i Oslo. Printed by Geologisk Museums Venner, 1993, pp. 164-165.; Michaelsen, A. (2019) Mineralene fra Minge blygruve, Sarpsborg, Østfold. Norsk Mineralsymposium: 71-81
UK
 
  • Scotland
    • Dumfries and Galloway
      • Wanlockhead
Neall, T., Green, D.I. (2008) Kegelite, a first British occurrence, from Wanlockhead, Dumfries and Galloway, Scotland. Journal of the Russell Society: 8: 110-111.
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矿物 and/or 产地  
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