Mineralogy Database

Grimaldiite Mineral Data

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General Grimaldiite Information

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