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Grischunite Mineral Data
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General Grischunite Information
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 Chemical Formula: |
NaCa2Mn++5Fe+++(AsO4)6•2(H2O) |
| Composition: |
Molecular Weight = 1,303.23 gm |
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Sodium 1.76 % Na 2.38 % Na2O |
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Calcium 6.15 % Ca 8.61 % CaO |
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Manganese 21.08 % Mn 27.22 % MnO |
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Iron 4.29 % Fe 6.13 % Fe2O3 |
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Arsenic 34.49 % As 52.91 % As2O5 |
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Hydrogen 0.31 % H 2.76 % H2O |
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Oxygen 31.92 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaCa2Mn2+5Fe3+(AsO4)6•2(H2O) |
| Environment: |
Alteration product of sarkinite in a manganese deposit. |
| IMA Status: |
Approved IMA 1984 |
| Locality: |
Falotta mine, Oberhalbstein, Graub�unden, Switzerland. Link to MinDat.org Location Data. |
| Name Origin: |
Named from the former Romansch name Grischun for Graubunden Canton. |
| Name Pronunciation: |
Grischunite + Pronunciation  |
| Synonym: |
ICSD 63431 |
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PDF 38-387 |
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