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Yttropyrochlore-(Y) Mineral Data
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General Yttropyrochlore-(Y) Information
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 Chemical Formula: |
(Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 |
| Composition: |
Molecular Weight = 455.99 gm |
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Sodium 1.01 % Na 1.36 % Na2O |
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Calcium 1.76 % Ca 2.46 % CaO |
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Yttrium 13.65 % Y 17.33 % Y2O3 |
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Uranium 10.44 % U 11.84 % UO2 |
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Tantalum 19.84 % Ta 24.23 % Ta2O5 |
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Titanium 2.10 % Ti 3.50 % TiO2 |
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Niobium 24.45 % Nb 34.98 % Nb2O5 |
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Iron 1.22 % Fe 1.75 % Fe2O3 |
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Hydrogen 0.62 % H 5.53 % H2O |
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Oxygen 24.91 % O |
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______ ______ |
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100.00 % 102.98 % = TOTAL OXIDE |
| Empirical Formula: |
Y0.7Na0.2Ca0.2U0.2Nb1.2Ta0.5Ti0.2Fe3+0.1O5.4(OH)0.6�1.1(H2O) |
| Environment: |
Replacement zones in a pegmatite. |
| IMA Status: |
Approved IMA 1977 |
| Locality: |
Alakurtti, northwestern Karelia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named as the YTTRium-dominent member ot the pyrochlore group. |
| Name Pronunciation: |
Yttropyrochlore-(Y) + Pronunciation  |
| Synonym: |
Obruchevite |
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