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Geigerite Mineral Data
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General Geigerite Information
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 Chemical Formula: |
Mn5(AsO3OH)2(AsO4)2•10(H2O) |
| Composition: |
Molecular Weight = 1,012.54 gm |
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Manganese 27.13 % Mn 35.03 % MnO |
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Arsenic 29.60 % As 45.40 % As2O5 |
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Hydrogen 2.19 % H 19.57 % H2O |
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Oxygen 41.08 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+5(AsO3OH)2(AsO4)2•10(H2O) |
| Environment: |
Cavities in radiolarites, formed by metamorphism of manganese oxide ores. |
| IMA Status: |
Approved IMA 1989 |
| Locality: |
Falotta mine, Oberhalbstein, Graub�unden, Switzerland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Thomas Geiger (1886-1976), Wiesendangen, Switzerland, who studied Falotta manganese ores. |
| Name Pronunciation: |
Geigerite + Pronunciation  |
| Synonym: |
ICSD 68637 |
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PDF 45-1347 |
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