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Betpakdalite-CaCa

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Formula:
[Ca2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O36(OH)]
System:
Monoclinic
Colour:
Yellow
Lustre:
Waxy
Hardness:
3
Name:
After the locality, the Kara-Oba West deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy, Kazakhstan.
Formerly called betpakdalite; redefined in 2010 (IMA 10-E).

Classification of Betpakdalite-CaCa

Redefined Approved 2010
8.DM.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1
49.4.1.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
4 : Compound Molybdates and Tungstates
22.5.8

22 : Phosphates, Arsenates or Vanadates with other Anions
5 : Phosphates, arsenates or vanadates with chromate, molybdate, niobate or tantalate
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Type Occurrence of Betpakdalite-CaCa

Year of Discovery:
1961

Physical Properties of Betpakdalite-CaCa

Colour:
Yellow
Hardness (Mohs):
3

Crystallography of Betpakdalite-CaCa

Crystal System:
Monoclinic
Cell Parameters:
a = 11.1Å, b = 19.44Å, c = 22.93Å
Ratio:
a:b:c = 0.571 : 1 : 1.18
Unit Cell Volume:
V 0.00 ų (Calculated from Unit Cell)

Optical Data of Betpakdalite-CaCa

Type:
Biaxial (+)
RI values:
nα = 1.782 nβ = 1.797 nγ = 1.850
2V:
Measured: 60° , Calculated: 58°
Max Birefringence:
δ = 0.068
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
extreme

Chemical Properties of Betpakdalite-CaCa

Formula:
[Ca2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O36(OH)]
Essential elements:
All elements listed in formula:

Relationship of Betpakdalite-CaCa to other Species

Other Members of Group:
Betpakdalite-CaMg[Ca2(H2O)17Mg(H2O)6][Mo8As2Fe33+O36(OH)]
Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O34(OH)3]
Betpakdalite-NaNa[Na2(H2O)16Na(H2O)6][Mo8As2Fe33+O33(OH)4]
8.DM.05MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
8.DM.05EsperanzaiteNaCa2Al2(AsO4)2(OH)F4 · 2H2O
8.DM.10ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2O
8.DM.10TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
8.DM.15Melkovite[Ca2(H2O)15Ca(H2O)6][Mo8P2Fe33+O36(OH)]
8.DM.15Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O34(OH)3]
8.DM.20Phosphovanadylite-BaBa[V44+P2O8(OH)8]·12H2O
8.DM.20Phosphovanadylite-CaCa[V44+P2O12(OH)4] · 12H2O
8.DM.25YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2O
8.DM.30UdumineliteCa3Al8(PO4)2O12 · 2H2O
8.DM.35DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed ·
8.DM.40Santafeite(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn84+(VO4)16(OH,O)20 · 8H2O
22.5.1VauquelinitePb2Cu(CrO4)(PO4)(OH)
22.5.2EmbreyitePb5(CrO4)2(PO4)2 · H2O
22.5.3CassedanneitePb5(CrO4)2(VO4)2 · H2O
22.5.4FornacitePb2Cu(CrO4)(AsO4)(OH)
22.5.5MolybdofornacitePb2Cu(MoO4,CrO4)(AsO4,PO4)(OH)
22.5.6Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe33+O35(OH)2]
22.5.7ParamendozaviliteNaAl4Fe7(PO4)5(PMo12O40)(OH)16 · 56H2O
22.5.9Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O34(OH)3]
22.5.10Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe33+O34(OH)3]
22.5.11Melkovite[Ca2(H2O)15Ca(H2O)6][Mo8P2Fe33+O36(OH)]
22.5.12RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O
22.5.13OlmsteaditeKFe22+(Nb5+,Ta5+)(PO4)2O2 · 2H2O
22.5.14JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)

Other Names for Betpakdalite-CaCa

Name in Other Languages:

Other Information

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 Betpakdalite-CaCa

Reference List:
Ermilova, L. P. & Senderova, V. M. (1961): Betpakdalite, a new mineral from the oxidation zone of the wolframite ore deposit of Karaoba (Central Kazakhstan). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 90, 425-430. (in Russian)

American Mineralogist: 47: 172.

Schmetzer, K., Nuber, B. & Tremmel, G. (1984): Betpakdalite from Tsumeb, Namibia: mineralogy, crystal chemistry and structure. Neues Jahrbuch für Mineralogie, Monatshefte 1984, 393-403. (in German.)

American Mineralogist: 70: 1333.

Moore, P. B. (1992): Betpakdalite unmasked, and a comment on bond valences. Australian Journal of Chemistry 45, 1335-1354.

American Mineralogist: 78: 849.

Cooper, M. A. & Hawthorne, F. C. (1999): The crystal structure of betpakdalite, and a new chemical formula: {Mg (H2O)6} Ca2 (H2O)13 [Mo6+8 As5+2 Fe3+3 O36 (OH)] (H2O)4. Canadian Mineralogist: 37, 61-66.

Internet Links for Betpakdalite-CaCa

Localities for Betpakdalite-CaCa

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • New South Wales
    • Gough Co.
      • Elsmore
No reference listed
Chile
 
  • Antofagasta Region
    • El Loa Province
      • Calama
        • Chuquicamata District
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
analysed with Edx, Pdf and Microprobe (by dr. Jochen Scluter)
China
 
  • Hebei Province
    • Zhangjiakou Prefecture
      • Guyuan Co.
Dahlkamp, F.J. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Horní Slavkov (Schlaggenwald)
        • Krásno (Schönfeld)
Sejkora, J., Ondruš, P., Fikar, M., Veselovský, F., Mach, Z., Gabašová, A., Skoda, R. & Beran, P. (2006): Supergene minerals at the Huber stock and Schnöd stock deposits, Krásno ore District, the Slavkovský les area, Czech Republic. Journal of the Czech Geological Society 51, 57-101.
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
        • Krupka (Graupen)
          • Knöttel area (Knötel; Knödel; Knödlberg)
Lapis 23(4), 18-34 (1998)
France
 
  • Limousin
    • Haute-Vienne
      • Nantiat
        • Vaulry
[MinRec 23:434]
          • Vaulry Mines
Queneau Patrice collection MinRec 23:434
Germany
 
  • Saxony
    • Erzgebirge
      • Schmiedeberg
Thomas Witzke
Japan
 
  • Honshu Island
    • Chugoku region
      • Hiroshima prefecture
        • Inland Sea (Setonaikai)
          • Ikuchi Island
The Mineral Species of Japan (5th ed) Matsubara
Kazakhstan
 
  • Almaty Province (Almaty Oblysy; Almati Oblast')
    • Lake Alakol (Lake Aaköl)
P.M. Kartashov data
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
    • Betpakdala Desert (Bet-Pak-Dal Desert)
[Nickel & Nichols, 1991 - "Mineral Reference Manual", p22]; Ermilova, L. P. & Senderova, V. M. (1961): Betpakdalite, a new mineral from the oxidation zone of the wolframite ore deposit of Karaoba (Central Kazakhstan). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 90, 425-430. (in Russian) ; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
Namibia
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Schmetzer, K. et al., Neues Jahrbuch Min., Monarshefte 1984, 393-403
Norway
 
  • Nordland
    • Tysfjord
Husdal, T. (2011): Tysfjordgranittens pegmatitter. Stein. 38 (4): 4-35
Mineral and/or Locality  
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