Magnesiochromite

Overview

MgCr2O4
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.2 g/cc
Hardness - Mohs	Magnesiochromite - 5.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	black
Streak	dark gray

Crystal Properties

Property	Value
Crystal structure	isometric - hexoctahedral
Cleavage	none
Tenacity	brittle
Fracture	uneven
Luster	metallic

Similar Minerals

Dana Number : 07.02.03.01

Class: 07

Group: 07.02

Subgroup: 07.02.03 - chromium

Dana Number	Mineral Name	Formula
07.02.03.01	magnesiochromite	MgCr2O4
07.02.03.06	zincochromite	Zn(Cr2O4)

Nickel-Strunz Number : 04.BB.05

Group : 04

Subgroup : BB

Nickel-Strunz Number	Mineral Name	Formula
04.BB.05	filipstadite	(Mn+2,Mg)4Sb+5Fe+3O8
04.BB.05	franklinite	(Zn,Mn+2,Fe+2)(Fe+3,Mn+3)2O4
04.BB.05	gahnite	ZnAl2O4
04.BB.05	magnesiochromite	MgCr2O4
04.BB.05	magnesiocoulsonite	MgV+32O4
04.BB.05	magnesioferrite	MgFe+32O4
04.BB.05	magnetite	Fe+2Fe+32O4
04.BB.05	zincochromite	Zn(Cr2O4)

Specimens

Localities

Uses