Natroalunite

Overview

NaAl3(SO4)2(OH)6
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.6-2.9 g/cc
Hardness - Mohs	Natroalunite - 3.5-4.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, gray, yellow, red, brown
Streak	white

Crystal Properties

Property	Value
Crystal structure	trigonal - hexagonal scalenohedral
Cleavage	distinct
Tenacity	brittle
Fracture	conchoidal
Luster	vitreous, pearly

Similar Minerals

Dana Number : 30.02.04.02

Class: 30

Group: 30.02

Subgroup: 30.02.04 - alunite

Dana Number	Mineral Name	Formula
30.02.04.02	natroalunite	NaAl3(SO4)2(OH)6
30.02.04.03	schlossmacherite	(H3O,Ca)Al3(AsO4,SO4)2(OH)6
30.02.04.04	osarizawaite	PbCuAl2(SO4)2(OH)6

Nickel-Strunz Number : 07.BC.10

Group : 07

Subgroup : BC

Nickel-Strunz Number	Mineral Name	Formula
07.BC.10	beaverite-(Cu)	PbCu+2(Fe+3,Al)2(SO4)2(OH)6
07.BC.10	jarosite	KFe+33(SO4)2(OH)6
07.BC.10	natroalunite	NaAl3(SO4)2(OH)6
07.BC.10	osarizawaite	PbCuAl2(SO4)2(OH)6
07.BC.10	plumbojarosite	PbFe+36(SO4)4(OH)12
07.BC.10	schlossmacherite	(H3O,Ca)Al3(AsO4,SO4)2(OH)6

Specimens

Localities

Uses