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Groutite Mineral Data
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General Groutite Information
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 Chemical Formula: |
Mn+++O(OH) |
| Composition: |
Molecular Weight = 87.94 gm |
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Manganese 62.47 % Mn 89.76 % Mn2O3 |
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Hydrogen 1.15 % H 10.24 % H2O |
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Oxygen 36.39 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mn3+O(OH) |
| Environment: |
A secondary mineral lining vugs in weathered banded iron formations. Trimorphous with manganite and feitknechtite. |
| IMA Status: |
Valid Species (Pre-IMA) 1945 |
| Locality: |
Mahnomen mine, Cuyuna Range, Crow Wing Co., Minnesota, USA Link to MinDat.org Location Data. |
| Name Origin: |
Named for Frank Fitch Grout (1880-1958), petrologist, of the University of Minnesota, Minneapolis, Minnesota, USA. |
| Name Pronunciation: |
Groutite  |
| Synonym: |
ICSD 30659 |
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PDF 24-713 |
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