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Phlogopite Mineral Data
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General Phlogopite Information
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 Chemical Formula: |
KMg3(Si3Al)O10(F,OH)2 |
| Composition: |
Molecular Weight = 419.25 gm |
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Potassium 9.33 % K 11.23 % K2O |
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Magnesium 17.39 % Mg 28.84 % MgO |
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Aluminum 6.44 % Al 12.16 % Al2O3 |
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Silicon 20.10 % Si 42.99 % SiO2 |
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Hydrogen 0.24 % H 2.15 % H2O |
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Oxygen 41.98 % O |
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Fluorine 4.53 % F 4.53 % F |
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- %
F -1.91 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KMg3AlSi3O10F(OH) |
| Environment: |
Contact and regional metamorphic limestones and dolomites. Ultramafic igneous rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1841 |
| Locality: |
St. Lawrence Co., at Edwards, New York, USA. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek flogopos - "resembling fire." |
| Name Pronunciation: |
Phlogopite + Pronunciation  |
| Synonym: |
Magnesium Mica |
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