Chemical Formula:
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Ca2Fe++(Al,Fe+++)2(SiO4)(Si2O7)(OH)2·(H2O) |
Composition:
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Molecular Weight = 485.24 g |
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Hydrogen |
0.62 % |
H |
5.57 % |
H2O |
0.00 % |
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Oxygen |
42.86 % |
O |
0.00 % |
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0.00 % |
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Aluminum |
11.12 % |
Al |
21.01 % |
Al2O3 |
0.00 % |
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Silicon |
17.36 % |
Si |
37.15 % |
SiO2 |
0.00 % |
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Calcium |
16.52 % |
Ca |
23.11 % |
CaO |
0.00 % |
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Iron |
11.51 % |
Fe |
14.81 % |
FeO |
0.00 % |
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99.99 % |
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101.65 % |
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Empirical Formula:
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Ca2Fe2+Al2(SiO4)(Si2O7)(OH)·(H2O) |
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Environment:
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Locality:
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Langban, near Filipstad, Varmland, Sweden (actually TL of julgoldite).. Link to
MinDat.org
Location Data.
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Name Origin:
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Named after the American geologist, R. Pumpelly (1837-1923) |
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Synonym:
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Ferropumpellyite |
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