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Bismutomicrolite Mineral Data
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General Bismutomicrolite Information
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 Chemical Formula: |
(Bi,Ca)(Ta,Nb)2O6(OH) |
| Composition: |
Molecular Weight = 589.91 gm |
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Calcium 2.72 % Ca 3.80 % CaO |
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Tantalum 52.15 % Ta 63.67 % Ta2O5 |
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Niobium 4.72 % Nb 6.76 % Nb2O5 |
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Bismuth 21.26 % Bi 23.70 % Bi2O3 |
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Hydrogen 0.17 % H 1.53 % H2O |
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Oxygen 18.99 % O |
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______ ______ |
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100.00 % 99.46 % = TOTAL OXIDE |
| Empirical Formula: |
Bi0.6Ca0.4Ta1.7Nb0.3O6(OH) |
| Environment: |
A late hydrothermal replacement of bismutotantalite in a lithium-bearing pegmatite. |
| IMA Status: |
Approved IMA 1977 |
| Locality: |
In the Wampewo pegmatite, Gamba Hill, near Kampala, Uganda. Link to MinDat.org Location Data. |
| Name Origin: |
Assigned by the IMA pyrochlore nomenclature group for the predominant bismuth content and to microlite. |
| Name Pronunciation: |
Bismutomicrolite + Pronunciation  |
| Synonym: |
Westgrenite |
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