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Bismutopyrochlore Mineral Data
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General Bismutopyrochlore Information
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 Chemical Formula: |
(Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)•n(H2O) |
| Composition: |
Molecular Weight = 562.81 gm |
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Calcium 2.14 % Ca 2.99 % CaO |
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Uranium 12.69 % U 15.25 % UO3 |
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Tantalum 8.04 % Ta 9.81 % Ta2O5 |
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Niobium 24.76 % Nb 35.42 % Nb2O5 |
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Bismuth 14.85 % Bi 16.56 % Bi2O3 |
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Hydrogen 1.72 % H 15.36 % H2O |
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Lead 3.68 % Pb 3.97 % PbO |
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Oxygen 32.12 % O |
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______ ______ |
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100.00 % 99.36 % = TOTAL OXIDE |
| Empirical Formula: |
Bi0.4U0.3Ca0.3Pb0.1Nb1.5Ta0.25O6(OH)•4.3(H2O) |
| Environment: |
Formed on lepidolite in miarolitic cavities in a pegmatite vein. A member of the pyrochlore group |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Mika pegmatite vein, central Rangkul' Highlands, Eastern Pamirs, Tajikistan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition and relationship to pyrochlore. |
| Synonym: |
IMA1998-059 |
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