Tephroite

Overview

Mn+22(SiO4)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.11-4.39 g/cc
Hardness - Mohs	Tephroite - 6.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	gray, green, red, brown
Streak	gray

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	indistinct
Tenacity	brittle
Fracture	conchoidal
Luster	vitreous, greasy

Similar Minerals

Dana Number : 51.03.01.04

Class: 51

Group: 51.03

Subgroup: 51.03.01 - olivine

Dana Number	Mineral Name	Formula
51.03.01.01	fayalite	Fe+22(SiO4)
51.03.01.02	forsterite	Mg2SiO4
51.03.01.03	liebenbergite	(Ni,Mg)2(SiO4)
51.03.01.04	tephroite	Mn+22(SiO4)

Nickel-Strunz Number : 09.AC.05

Group : 09

Subgroup : AC

Nickel-Strunz Number	Mineral Name	Formula
09.AC.05	fayalite	Fe+22(SiO4)
09.AC.05	forsterite	Mg2SiO4
09.AC.05	liebenbergite	(Ni,Mg)2(SiO4)
09.AC.05	tephroite	Mn+22(SiO4)

Specimens

Localities

Uses