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Magnussonite Mineral Data
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General Magnussonite Information
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 Chemical Formula: |
Mn++5As+++3O9(OH,Cl) |
| Composition: |
Molecular Weight = 665.07 gm |
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Manganese 41.30 % Mn 53.33 % MnO |
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Arsenic 33.80 % As 44.62 % As2O3 |
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Hydrogen 0.11 % H 1.02 % H2O |
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Chlorine 1.33 % Cl 1.33 % Cl |
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- %
Cl -0.30 % -O=Cl2 |
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Oxygen 23.46 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+5As3O9(OH)0.75Cl0.25 |
| Environment: |
In a metamorphosed Fe-Mn orebody. |
| IMA Status: |
Valid Species (Pre-IMA) 1956 |
| Locality: |
Langban, Varmland, and in the Brattfors mine, Nordmark, Varmland, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Nils Harald Magnusson (1890-1976), formerly Director, Geological Survey of Sweden, for his contributions to knowledge of the Langban mine. |
| Name Pronunciation: |
Magnussonite + Pronunciation  |
| Synonym: |
ICSD 100494 |
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PDF 10-407 |
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