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Grimaldiite Mineral Data
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General Grimaldiite Information
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 Chemical Formula: |
Cr+++O(OH) |
| Composition: |
Molecular Weight = 85.00 gm |
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Chromium 61.17 % Cr 89.40 % Cr2O3 |
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Hydrogen 1.19 % H 10.60 % H2O |
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Oxygen 37.64 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CrO(OH) |
| Environment: |
Fine-grained intergrowth with other chromium oxide-hydroxide minerals in alluvial gravels. Trimorphous with bracewellite and guyanaite. |
| IMA Status: |
Approved IMA 1967 |
| Locality: |
Basin of the Merume River, Guyana. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Frank Saverio Grimaldi (1915- ), formerly Chief Chemist, U.S. Geological Survey. |
| Name Pronunciation: |
Grimaldiite + Pronunciation  |
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