Groutite

Overview

Mn+3O(OH)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.144 g/cc
Hardness - Mohs	Groutite - 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 brown

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	perfect
Tenacity	brittle
Fracture	uneven
Luster	adamantine

Similar Minerals

Dana Number : 06.01.01.03

Class: 06

Group: 06.01

Subgroup: 06.01.01 - diaspore

Dana Number	Mineral Name	Formula
06.01.01.02	goethite	Fe+3O(OH)
06.01.01.03	groutite	Mn+3O(OH)
06.01.01.06	tsumgallite	GaO(OH)

Nickel-Strunz Number : 04.FD.10

Group : 04

Subgroup : FD

Nickel-Strunz Number	Mineral Name	Formula
04.FD.10	goethite	Fe+3O(OH)
04.FD.10	groutite	Mn+3O(OH)
04.FD.10	tsumgallite	GaO(OH)

Specimens

Localities

Uses