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Hydrobiotite Mineral Data
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General Hydrobiotite Information
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 Chemical Formula: |
[K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]•[(Mg,Fe++,Al)3(Si,Al)4O10(OH)2•4(H2O)] |
| Composition: |
Molecular Weight = 464.62 gm |
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Potassium 2.52 % K 3.04 % K2O |
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Calcium 0.86 % Ca 1.21 % CaO |
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Magnesium 12.03 % Mg 19.95 % MgO |
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Aluminum 6.97 % Al 13.17 % Al2O3 |
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Iron 7.21 % Fe 10.31 % Fe2O3 |
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Silicon 16.93 % Si 36.21 % SiO2 |
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Hydrogen 1.69 % H 15.12 % H2O |
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Oxygen 50.96 % O |
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Fluorine 0.82 % F 0.82 % F |
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- %
F -0.34 % -O=F2 |
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______ ______ |
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100.00 % 99.48 % = TOTAL OXIDE |
| Empirical Formula: |
Mg2.3Fe3+0.6K0.3Ca0.1Si2.8Al1.2O10(OH)1.8F0.2�3(H2O) |
| Environment: |
Found in a wide variety of sedimentary environments. |
| IMA Status: |
Valid Species (Pre-IMA) 1882 |
| Locality: |
Common world wide. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the water content and its relationship to biotite. |
| Name Pronunciation: |
Hydrobiotite + Pronunciation  |
| Synonym: |
Biotitic vermiculite |
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Hydromica |
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Jefferisite |
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