| Sodium-betpakdalite Mineral Data |
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- 49.4.4.1 Sodium-betpakdalite (Na,Ca)3Fe2(As2Mo6O28)·15(H2O) Unk Mono
- VII/C.33-10 Melkovite CaFeH6(MoO4)4(PO4)·6(H2O) Unk. Mono
- VII/C.33-20 Sodium-betpakdalite (Na,Ca)3Fe2(As2Mo6O28)·15(H2O) Unk Mono
- VII/C.33-30 Betpakdalite [Mg(H2O)6]Ca2(H2O)13[Mo8As2Fe3O36(OH)]·4(H2O) C 2/m 2/m
- VII/C.33-40 Obradovicite H4(K,Na)CuFe2(AsO4)(MoO4)5·12(H2O) Pcnm 2/m 2/m 2/m
General Sodium-betpakdalite Information |
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 Chemical Formula: |
(Na,Ca)3Fe+++2(As2Mo6O28)·15(H2O) | ||
| Composition: |
Molecular Weight = 1,641.45 gm | ||
| Sodium 2.80 % Na 3.78 % Na2O | |||
| Calcium 2.44 % Ca 3.42 % CaO | |||
| Iron 6.80 % Fe 9.73 % Fe2O3 | |||
| Molybdenum 35.07 % Mo 52.61 % MoO3 | |||
| Arsenic 9.13 % As 14.00 % As2O5 | |||
| Hydrogen 1.84 % H 16.46 % H2O | |||
| Oxygen 41.91 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na2CaFe3+2As2Mo6O28·15(H2O) | ||
| Environment: |
In the zone of oxidation of a molybdenum deposit. | ||
| IMA Status: |
Approved IMA 1971 | ||
| Locality: |
Kazakhstan (?) Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the chemistry and similarity to betpakdalite. | ||
Search for Sodium-betpakdalite Images | |||
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Images:
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Sodium-betpakdalite Crystallography |
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| Axial Ratios: |
a:b:c =0.5844:1:0.9155 | ||
| Cell Dimensions: |
a = 11.28, b = 19.3, c = 17.67, Z = 4; beta = 94.5° V = 3,834.97 Den(Calc)= 2.84 | ||
| Crystal System: |
MonoclinicSpace Group: Unk | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.73(1), 3.63(0.9), 1.84(0.8), | ||
Physical Properties of Sodium-betpakdalite |
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| Color: |
Lemon yellow. | ||
| Density: |
2.92 | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Luster: |
Earthy (Dull) | ||
Optical Properties of Sodium-betpakdalite |
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| Gladstone-Dale: |
CI meas= -0.105 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.136 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.282,KPDmeas= 0.2743,KC= 0.2483 |
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| Optical Data: |
Biaxial (?), a=1.792, g=1.81, bire=0.0180 | ||
| Pleochroism (x): |
pale yellow. | ||
| Pleochroism (z): |
yellow. | ||
Calculated Properties of Sodium-betpakdalite |
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| Electron Density: |
relectron=2.80 gm/cc |
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| Fermion Index |
Fermion Index = 0.091 Boson Index = 0.909 |
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| Photoelectric: |
PESodium-betpakdalite = 64.67 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sodium-betpakdalite is Not Radioactive |
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Sodium-betpakdalite Classification |
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| Dana Class: |
49.4.4.1 (49)Basic and Hydrated Molybdates and Tungstates | ||
| (49.4)(Compound Anions) | |||
| (49.4.4)Dana Group | |||
| Strunz Class: |
VII/C.33-20 VII - Phosphates, Arsenates and Vanadates | ||
| VII/C - Water-bearing phosphates without unfamiliar anions, molybdophosphates with [MoO4]2- - [PO4]3- and similar | |||
| VII/C.33 - Melkovite - Obradovicite series | |||
Other Sodium-betpakdalite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Sodium-betpakdalite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Sodium-betpakdalite using: Visit our Advertisers for Sodium-betpakdalite : Translate Sodium-betpakdalite Mineral Data : Ask about Sodium-betpakdalite here : Print or Cut-and-Paste your Sodium-betpakdalite Specimen Label here :
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