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Cochromite Mineral Data
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General Cochromite Information
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 Chemical Formula: |
(Co,Ni,Fe++)(Cr,Al)2O4 |
| Composition: |
Molecular Weight = 207.97 gm |
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Magnesium 1.17 % Mg 1.94 % MgO |
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Aluminum 5.19 % Al 9.81 % Al2O3 |
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Chromium 35.00 % Cr 51.16 % Cr2O3 |
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Iron 8.06 % Fe 6.91 % FeO / 3.84 % Fe2O3 |
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Cobalt 14.17 % Co 18.01 % CoO |
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Nickel 5.64 % Ni 7.18 % NiO |
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Oxygen 30.77 % O |
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______ ______ |
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100.00 % 98.85 % = TOTAL OXIDE |
| Empirical Formula: |
Co0.5Ni0.2Fe2+0.2Mg0.1Cr1.4Al0.4Fe3+0.1O4 |
| Environment: |
Replacing chromite in a small tabular nickel deposit in a contact between quartzite and serpentinized ultramafics. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Bon Accord deposit, Barberton, Transvaal, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
Named for a chromite with essential cobalt. |
| Synonym: |
ICSD 69503 |
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PDF 22-1084 |
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