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Eastonite Mineral Data
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General Eastonite Information
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 Chemical Formula: |
KMg2Al[Al2Si2O10](OH)2 |
| Composition: |
Molecular Weight = 418.83 gm |
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Potassium 9.34 % K 11.25 % K2O |
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Magnesium 11.61 % Mg 19.25 % MgO |
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Aluminum 19.33 % Al 36.52 % Al2O3 |
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Silicon 13.41 % Si 28.69 % SiO2 |
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Hydrogen 0.48 % H 4.30 % H2O |
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Oxygen 45.84 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KMg2Al3Si2O10(OH)2 |
| Environment: |
Forms a series with siderophyllite and other biotite group micas. |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Easton, Pennsylvania, USA Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Eastonite + Pronunciation  |
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