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Ungursaite Mineral Data
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General Ungursaite Information
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 Chemical Formula: |
NaCa5(Ta,Nb)24O65(OH) |
| Composition: |
Molecular Weight = 5,094.85 gm |
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Sodium 0.45 % Na 0.61 % Na2O |
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Calcium 3.93 % Ca 5.50 % CaO |
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Tantalum 63.93 % Ta 78.06 % Ta2O5 |
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Niobium 10.94 % Nb 15.65 % Nb2O5 |
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Hydrogen 0.02 % H 0.18 % H2O |
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Oxygen 20.73 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaCa5Ta18Nb6O65(OH) |
| Environment: |
Occurs in the margins of thoreaulite crystals from granitic pegmatite. |
| IMA Status: |
Not Approved IMA 1988 - Published 1985 |
| Locality: |
Ungursai, East Kazakhstan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
ICSD 65336 |
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PDF 15-679 |
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