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Apophyllite Mineral Data
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General Apophyllite Information
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 Chemical Formula: |
KCa4(Si4O10)2F•8(H2O) |
| Composition: |
Molecular Weight = 907.20 gm |
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Potassium 4.31 % K 5.19 % K2O |
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Calcium 17.67 % Ca 24.73 % CaO |
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Silicon 24.77 % Si 52.98 % SiO2 |
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Hydrogen 1.78 % H 15.89 % H2O |
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Oxygen 49.38 % O |
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Fluorine 2.09 % F 2.09 % F |
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- %
F -0.88 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KCa4(Si4O10)2F•8(H2O) |
| Environment: |
Secondary mineral in basalts. Redefined as a group name for the fluor-, hydroxy- in 1978. |
| IMA Status: |
Not Approved IMA 1978 |
| Locality: |
Lonault and Poona, southeast of Bombay, India. Link to MinDat.org Location Data. |
| Name Origin: |
Named in 1800 from the Greek apophylliso - "it flakes off." |
| Name Pronunciation: |
Apophyllite + Pronunciation  |
| Synonym: |
ICSD 12108 |
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PDF 19-82 |
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