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Apophyllite-(KOH) Mineral Data
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General Apophyllite-(KOH) Information
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 Chemical Formula: |
KCa4Si8O20(OH,F)•8(H2O) |
| Composition: |
Molecular Weight = 759.07 gm |
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Potassium 4.38 % K 5.27 % K2O |
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Sodium 0.45 % Na 0.61 % Na2O |
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Calcium 21.12 % Ca 29.55 % CaO |
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Silicon 29.60 % Si 63.32 % SiO2 |
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Hydrogen 0.11 % H 0.95 % H2O |
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Oxygen 43.84 % O |
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Fluorine 0.50 % F 0.50 % F |
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- %
F -0.21 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
K0.85Na0.15Ca4Si8O20(OH)0.8F0.2 |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Ore Knob mine, Jefferson, Ashe County, North Carolina, USA Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek apophylliso - "it flakes off" and the predominant hydroxyl anion. |
| Name Pronunciation: |
Apophyllite-(KOH) + Pronunciation  |
| Synonym: |
Hydroxyapophyllite - Renamed to Apophyllite-(KOH) by Mineralogical Record, v39, (2008), p 131 |
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