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Samarskite-(Y) Mineral Data
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General Samarskite-(Y) Information
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 Chemical Formula: |
(Y,Fe+++,U)(Nb,Ta)5O4 |
| Composition: |
Molecular Weight = 299.85 gm |
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La,Ce,Pr,Nd,Sm, 14.41 % RE 16.81 % REE2O3 |
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Yttrium 5.93 % Y 7.53 % Y2O3 |
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Uranium 15.88 % U 18.01 % UO2 |
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Tantalum 12.07 % Ta 14.74 % Ta2O5 |
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Niobium 24.79 % Nb 35.46 % Nb2O5 |
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Iron 5.59 % Fe 7.99 % Fe2O3 |
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Oxygen 21.34 % O |
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______ ______ |
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100.00 % 100.53 % = TOTAL OXIDE |
| Empirical Formula: |
Y0.2REE0.3Fe3+0.3U0.2Nb0.8Ta0.2O4 |
| Environment: |
Accessory mineral in REE-rich granite pegmatites. |
| IMA Status: |
Valid Species (Pre-IMA) 1847 |
| Locality: |
Miass, Ilmen Mountains, Southern Ural Mountains, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Vasilii Yefrafovich von Samarski-Bykhovets (1803-1870), Chief of Staff of the Russian Corps of Mining Engineers. |
| Name Pronunciation: |
Samarskite-(Y) + Pronunciation  |
| Synonym: |
Priazovite - mixture of samarskite-(Y) and U,Ti-rich mineral of the pyrochlore group |
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