Betpakdalite-CaCa (original) (raw)

A valid IMA mineral species

About Betpakdalite-CaCaHide

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Formula:

[Ca2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O36(OH)]

Colour:

Lemon-yellow with greenish tint

Specific Gravity:

2.98 - 3.05

Crystal System:

Monoclinic

Name:

Named betpakdalite by L.P. Ermilova and V.M. Senderova in 1961 after the Betpakdala (Bet-Pak-Dal) Desert, Kazakhstan that includes the type locality.

It was redefined in 2010 (IMA 10-E) and renamed betpakdalite-CaCa.

This page provides mineralogical data about Betpakdalite-CaCa.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:651:4

0b07f472-53fa-4ea8-a801-22d2e942cf94

IMA Classification of Betpakdalite-CaCaHide

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IMA status notes:

Renamed by the IMA

Approval history:

Renamed by IMA: 2010

Classification of Betpakdalite-CaCaHide

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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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of Betpakdalite-CaCaHide

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Colour:

Lemon-yellow with greenish tint

Density:

2.98 - 3.05 g/cm3 (Measured) 2.913 g/cm3 (Calculated)

Optical Data of Betpakdalite-CaCaHide

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RI values:

_n_α = 1.782 - 1.809 _n_β = 1.797 - 1.821 _n_γ = 1.850 - 1.857

2V:

Measured: 60° , Calculated: 53° to 88°

δ = 0.068

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

extreme, inclined

Optical Extinction:

Y = b; X ∧ c = 12°.

Comments:

X = pale yellow, Y = greenish yellow, Z= bluish.

Comments:

Absorption: Z > Y > X.

Chemistry of Betpakdalite-CaCaHide

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Mindat Formula:

[Ca2(H2O)17Ca(H2O)6][Mo6+8As5+2Fe3+3O36(OH)]

Crystallography of Betpakdalite-CaCaHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 19.507(2) Å, b = 11.0768(9) Å, c = 15.2618(19) Å
β = 131.2618(5)°

Ratio:

a:b:c = 1.761 : 1 : 1.378

Comment:

Cell parameters from SCXRD (Kampf et al 2012)

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005591	Betpakdalite-CaCa	Cooper M A, Hawthorne F C (1999) The crystal structure of betpakdalite, and a new chemical formula: {Mg(H2O)6}Ca2(H2O)13[Mo8As2Fe3O36(OH)](H2O)4 The Canadian Mineralogist 37 61-66		1999	0	293
0014792	Betpakdalite-CaCa	Schmetzer K, Nuber B, Tremmel G (1984) Betpakdalite from Tsumeb, Namibia: mineralogy, crystal chemistry and structure Neues Jahrbuch fur Mineralogie, Monatshefte 1984 393-403	1984	Tsumeb, Namibia	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Kara-Oba deposit, Kazakhstan. Data from Ermilova and Senderova (1961).

Geological EnvironmentHide

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Type Occurrence of Betpakdalite-CaCaHide

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General Appearance of Type Material:

Powdery finely-crystalline aggregates, individual crystals being 0.005 to 0.025 mm.

Place of Conservation of Type Material:

No designated type material.

Geological Setting of Type Material:

Oxidation zone of a wolframite deposit, that consists of early quartz-wolframite-veins and later quartz-huebnerite-pyrite-arsenopyrite veins.

Associated Minerals at Type Locality:

Other Language Names for Betpakdalite-CaCaHide

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Relationship of Betpakdalite-CaCa to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

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

Internet Links for Betpakdalite-CaCaHide

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References for Betpakdalite-CaCaHide

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Reference List:

Schmetzer, K., Nuber, B., Tremmel, G. (1984) Betpakdalit aus Tsumeb, Namibia: Mineralogie, Kristallchemie und Struktur. [Betpakdalite from Tsumeb, Namibia: mineralogy, crystal chemistry and structure.]. Neues Jahrbuch für Mineralogie, Monatshefte, 1984. 393-403

Dunn, Pete J., Ferraiolo, James A., Fleischer, Michael, Gobel, Volker, Grice, Joel D., Langley, Richard H., Shigley, James E., Vanko, David A., Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (11-12) 1329-1335

Kampf, A. R., Mills, S. J., Rumsey, M. S., Dini, M., Birch, W. D., Spratt, J., Pluth, J. J., Steele, I. M., Jenkins, R. A., Pinch, W. W. (2012) The heteropolymolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine, 76 (5) 1175-1207 doi:10.1180/minmag.2012.076.5.09

Localities for Betpakdalite-CaCaHide

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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

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- 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.