Althausite

Overview

Mg2(PO4)(OH,F,O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.97 g/cc
Hardness - Mohs	Althausite - 3.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	gray
Streak	white

Crystal Properties

Property	Value
Crystal structure	orthorhombic - pyramidal
Cleavage	perfect
Tenacity	-
Fracture	-
Luster	vitreous, glassy

Similar Minerals

Dana Number : 41.06.05.01

Class: 41

Group: 41.06

Subgroup: 41.06.05 - althausite

Dana Number	Mineral Name	Formula
41.06.05.01	althausite	Mg2(PO4)(OH,F,O)
41.06.05.07	auriacusite	Fe+3Cu+2(AsO4)O

Nickel-Strunz Number : 08.BB.25

Group : 08

Subgroup : BB

Nickel-Strunz Number	Mineral Name	Formula
08.BB.25	althausite	Mg2(PO4)(OH,F,O)

Specimens

Localities

Uses