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Pumpellyite-(Fe++) Mineral Data
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General Pumpellyite-(Fe++) Information
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 Chemical Formula: |
Ca2Fe++(Al,Fe+++)2(SiO4)(Si2O7)(OH)2•(H2O) |
| Composition: |
Molecular Weight = 485.24 gm |
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Calcium 16.52 % Ca 23.11 % CaO |
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Aluminum 11.12 % Al 21.01 % Al2O3 |
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Iron 11.51 % Fe 14.81 % FeO |
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Silicon 17.36 % Si 37.15 % SiO2 |
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Hydrogen 0.62 % H 5.57 % H2O |
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Oxygen 42.86 % O |
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______ ______ |
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100.00 % 101.65 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Fe2+Al2(SiO4)(Si2O7)(OH)•(H2O) |
| IMA Status: |
Approved IMA 1971 |
| Locality: |
Langban, near Filipstad, Varmland, Sweden (actually 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  |
| Synonym: |
Ferropumpellyite |
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