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Pumpellyite-(Mg) Mineral Data
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General Pumpellyite-(Mg) Information
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 Chemical Formula: |
Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) |
| Composition: |
Molecular Weight = 470.70 gm |
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Calcium 17.03 % Ca 23.83 % CaO |
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Magnesium 5.16 % Mg 8.56 % MgO |
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Aluminum 11.46 % Al 21.66 % Al2O3 |
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Silicon 17.90 % Si 38.29 % SiO2 |
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Hydrogen 0.86 % H 7.65 % H2O |
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Oxygen 47.59 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) |
| Environment: |
Meta-basalt or gabbroic rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1925 |
| Locality: |
Calumet mine, Houghton County, Keweenaw Peninisula, Michigan, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the American geologist, R. Pumpelly (1837-1923). |
| Name Pronunciation: |
Pumpellyite-(Mg) + Pronunciation  |
| Synonym: |
Pumpellyite |
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