Zincochromite
Zincochromite | |
---|---|
General | |
Category | Spinel group |
Formula (repeating unit) | ZnCr2O4 |
Strunz classification | 4.BB.05 |
Crystal system | Cubic |
Unit cell | a = 8.32 Å; Z = 8 |
Identification | |
Color | Brownish black |
Crystal habit | Zoned euhedral crystals with hexagonal outline |
Crystal symmetry |
Isometric - hexoctahedral Point group: Fd3m (4/m 3 2/m) Space group m3m |
Mohs scale hardness | 5.8 |
Luster | Semimetallic |
Streak | Brown |
Diaphaneity | Opaque, translucent in thin slivers |
Optical properties | Isotropic |
Other characteristics | Weakly paramagnetic |
References | [1][2][3][4] |
Zincochromite is a zinc chromium oxide mineral with the formula ZnCr2O4. It is the zinc analogue of chromite, hence the name. It was first described in 1987 as an occurrence in a uranium deposit near Lake Onega, Russia.[3] It has also been reported from Dolo Hill, New South Wales, Australia, and from the Tarkwa Mine in the Ashanti gold belt of Ghana.[1]
References
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