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Foshallasite Mineral Data
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General Foshallasite Information
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 Chemical Formula: |
Ca3Si2O7•3(H2O) |
| Composition: |
Molecular Weight = 342.45 gm |
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Calcium 35.11 % Ca 49.13 % CaO |
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Silicon 16.40 % Si 35.09 % SiO2 |
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Hydrogen 1.77 % H 15.78 % H2O |
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Oxygen 46.72 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3Si2O7•3(H2O) |
| Environment: |
Alkaline nepheline syenites. Foshallasite (1936) is now considered zeophyllite (1902). |
| IMA Status: |
Discredited IMA 2006 - Valid Species (Pre-IMA) 1936 |
| Locality: |
Mt. Yukspor, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Willian Frederick Foshag (1984-1956), American mineralogist, and for the mineral centrallasite (now named gyrolite). |
| Name Pronunciation: |
Foshallasite + Pronunciation  |
| Synonym: |
Discredited - Foshallasite (1936) is now considered zeophyllite (1902). |
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