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Allanite-(Y) Mineral Data
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General Allanite-(Y) Information
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 Chemical Formula: |
(Y,Ce,Ca)2(Al,Fe+++)3(SiO4)3(OH) |
| Composition: |
Molecular Weight = 598.63 gm |
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Calcium 2.01 % Ca 2.81 % CaO |
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Cerium 14.04 % Ce 16.45 % Ce2O3 |
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Yttrium 17.82 % Y 22.63 % Y2O3 |
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Aluminum 10.14 % Al 19.16 % Al2O3 |
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Iron 7.00 % Fe 10.00 % Fe2O3 |
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Silicon 14.07 % Si 30.11 % SiO2 |
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Hydrogen 0.17 % H 1.50 % H2O |
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Oxygen 34.74 % O |
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______ ______ |
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100.00 % 102.67 % = TOTAL OXIDE |
| Empirical Formula: |
Y1.2Ce0.6Ca0.3Al2.25Fe3+0.75(SiO4)3(OH) |
| IMA Status: |
Valid Species (Pre-IMA) 1949 - Dana Number Modified from 58.2.1a.3 |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named after the Scottish mineralogist, T. Allan (1777-1833). |
| Name Pronunciation: |
Allanite-(Y)  |
| Synonym: |
Orthite |
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