Zincochromite
(repeating unit)ZnCr2O4 IMA symbol Zchr[1] Strunz classification 4.BB.05 Crystal system Cubic Crystal class Hexoctahedral (m3m)
H-M symbol: (4/m 3 2/m) Space group Fd3m Unit cell a = 8.32 Å; Z = 8 Identification Color Brownish black Crystal habit Zoned euhedral crystals with hexagonal outline Mohs scale hardness 5.8 Luster Semimetallic Streak Brown Diaphaneity Opaque, translucent in thin slivers Optical properties Isotropic Other characteristics Weakly paramagnetic References [2][3][4][5]
H-M symbol: (4/m 3 2/m)
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.[4] It has also been reported from Dolo Hill, New South Wales, Australia, and from the Tarkwa Mine in the Ashanti gold belt of Ghana.[2]
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