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Siderophyllite Mineral Data
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General Siderophyllite Information
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 Chemical Formula: |
KFe++2Al(Al2Si2)O10(F,OH)2 |
| Composition: |
Molecular Weight = 484.90 gm |
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Potassium 8.06 % K 9.71 % K2O |
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Aluminum 16.69 % Al 31.54 % Al2O3 |
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Iron 23.03 % Fe 29.63 % FeO |
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Silicon 11.58 % Si 24.78 % SiO2 |
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Hydrogen 0.10 % H 0.93 % H2O |
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Oxygen 34.64 % O |
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Fluorine 5.88 % F 5.88 % F |
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- %
F -2.47 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KFe2+2Al3Si2O10F1.5(OH)0.5 |
| Environment: |
In pegmatites. |
| IMA Status: |
Valid Species (Pre-IMA) 1880 |
| Locality: |
Pikes Peak, Park County, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Greek for "iron" and "leaf" in allusion to the composition and the micaceous character. |
| Name Pronunciation: |
Siderophyllite + Pronunciation  |
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