Zincochromite

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Zincochromite
General
Category Spinel group
Formula
(repeating unit)
ZnCr2O4
Strunz classification 04.BB.05
Crystal symmetry Isometric hexoctahedral (4/m 3 2/m)
Unit cell a = 8.32 Å; Z = 8
Identification
Color Brownish black
Crystal habit Zoned euhedral crystals with hexagonal outline
Crystal system Cubic
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]

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[edit]