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Fluorannite Mineral Data
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General Fluorannite Information
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 Chemical Formula: |
KFe++3AlSi3O10F2 |
| Composition: |
Molecular Weight = 473.80 gm |
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Potassium 7.43 % K 8.95 % K2O |
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Lithium 0.29 % Li 0.63 % Li2O |
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Magnesium 1.03 % Mg 1.70 % MgO |
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Aluminum 7.97 % Al 15.06 % Al2O3 |
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Iron 27.11 % Fe 34.88 % FeO |
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Silicon 16.60 % Si 35.51 % SiO2 |
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Hydrogen 0.11 % H 0.95 % H2O |
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Oxygen 35.46 % O |
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Fluorine 4.01 % F 4.01 % F |
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- %
F -1.69 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.9Fe2+1.8Fe2+0.5Mg0.2Li0.2Al1.4SI2.8O10F(OH)0.5 |
| Environment: |
Rock forming mineral in the upper part of an A-type granite (Huangshan granite).F-analogue of annite. |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
Western suburb of Suzhou City, near Shanghai, eastern China. Link to MinDat.org Location Data. |
| Name Origin: |
Named as fluorine-rich annite. |
| Synonym: |
IMA1999-048 |
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