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Pumpellyite-(Fe+++) Mineral Data
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General Pumpellyite-(Fe+++) Information
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 Chemical Formula: |
Ca2Fe+++Al2(SiO4)(Si2O7)(OH,O)2•(H2O) |
| Composition: |
Molecular Weight = 502.25 gm |
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Calcium 15.96 % Ca 22.33 % CaO |
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Aluminum 10.74 % Al 20.30 % Al2O3 |
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Iron 11.12 % Fe 15.90 % Fe2O3 |
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Silicon 16.78 % Si 35.89 % SiO2 |
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Hydrogen 0.80 % H 7.17 % H2O |
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Oxygen 44.60 % O |
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______ ______ |
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100.00 % 101.59 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Fe3+Al2(SiO4)(Si2O7)(OH)2•(H2O) |
| Environment: |
Metamorphic rocks. |
| IMA Status: |
Approved IMA 1973 |
| Locality: |
Langban, near Filipstad, Varmland, Sweden (actually the TL of julgoldite). Link to MinDat.org Location Data. |
| Name Origin: |
Named after the American geologist, R. Pumpelly (1837-1923). |
| Name Pronunciation: |
Pumpellyite-(Fe+++) + Pronunciation  |
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