Cochromite
Cochromite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CoCr₂O₄.
It crystallizes in the cubic crystal system (space group Fd3m). It is a member of the Spinel structural group.
Key properties: specific gravity 4.99; Greenish gray streak; Metallic luster.
IMA symbol Cchr, IMA status: approved, named in 1978.
Replacing chromite in a small tabular nickel deposit at the contact between quartzite and serpentinized ultramafics; it appears to have formed at ∼730 ° C and < 2 kbar during thermal metamorphism.
It is found associated with Trevorite, nichromite, liebenbergite, bunsenite (Bon Accord, South Africa); corundum, albite (Bo Phloi, Thailand).
The name refers to a chromite with essential cobalt, Co.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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