Köttigite

Overview

Zn3(AsO4)2
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.33 g/cc
Hardness - Mohs	Köttigite - 2.5-3.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	red, brown, white, colorless, blue
Streak	reddish white to white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	flexible
Fracture	fibrous
Luster	silky

Similar Minerals

Dana Number : 40.03.06.05

Class: 40

Group: 40.03

Subgroup: 40.03.06 - vivianite

Dana Number	Mineral Name	Formula
40.03.06.01	vivianite	Fe+23(PO4)2·8(H2O)
40.03.06.02	baricite	(Mg,Fe+2)3(PO4)2·8(H2O)
40.03.06.03	erythrite	Co3(AsO4)2·8(H20)
40.03.06.04	annabergite	Ni3(AsO4)2·8(H2O)
40.03.06.04	cabrerite	(Ni,Mg)3(AsO4)2·8(H2O)
40.03.06.05	köttigite	Zn3(AsO4)2
40.03.06.06	parasymplesite	Fe+23(AsO4)2·8(H2O)

Nickel-Strunz Number : 08.CE.40

Group : 08

Subgroup : CE

Nickel-Strunz Number	Mineral Name	Formula
08.CE.40	annabergite	Ni3(AsO4)2·8(H2O)
08.CE.40	baricite	(Mg,Fe+2)3(PO4)2·8(H2O)
08.CE.40	cabrerite	(Ni,Mg)3(AsO4)2·8(H2O)
08.CE.40	erythrite	Co3(AsO4)2·8(H20)
08.CE.40	köttigite	Zn3(AsO4)2
08.CE.40	manganohörnesite	(Mn,Mg)3(AsO4)2·8(H2O)
08.CE.40	parasymplesite	Fe+23(AsO4)2·8(H2O)
08.CE.40	vivianite	Fe+23(PO4)2·8(H2O)

Specimens

Localities

Uses