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Apophyllite-(KF) Mineral Data
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General Apophyllite-(KF) Information
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 Chemical Formula: |
(K,Na)Ca4Si8O20(F,OH)•8(H2O) |
| Composition: |
Molecular Weight = 760.47 gm |
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Potassium 4.37 % K 5.26 % K2O |
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Sodium 0.45 % Na 0.61 % Na2O |
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Calcium 21.08 % Ca 29.50 % CaO |
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Silicon 29.55 % Si 63.21 % SiO2 |
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Hydrogen 0.01 % H 0.12 % H2O |
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Oxygen 42.29 % O |
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Fluorine 2.25 % F 2.25 % F |
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- %
F -0.95 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.85Na0.15Ca4Si8O20F0.9(OH)0.1 |
| Environment: |
A secondary mineral in amygdules or druses in basalts. A late-stage mineral in some mineral deposits. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Poona, Nasik, and Bombay districts, Maharashtra, India. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek apophylliso - "it flakes off." and the composition containing fluorine; |
| Name Pronunciation: |
Apophyllite-(KF) + Pronunciation  |
| Synonym: |
Fluorapophyllite - Renamed to Apophyllite-(F) by Mineralogical Record, v39, (2008), p 131 |
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