Pentahydrite

Overview

Mg(SO4)·5(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	1.9 g/cc
Hardness - Mohs	Pentahydrite - 2.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, light blue, light green blue
Streak	white

Crystal Properties

Property	Value
Crystal structure	triclinic - pinacoidal
Cleavage	none
Tenacity	-
Fracture	-
Luster	vitreous, glassy

Similar Minerals

Dana Number : 29.06.07.03

Class: 29

Group: 29.06

Subgroup: 29.06.07 - chalchanthite

Dana Number	Mineral Name	Formula
29.06.07.02	siderotil	Fe+2(SO4)·5(H2O)
29.06.07.03	pentahydrite	Mg(SO4)·5(H2O)

Nickel-Strunz Number : 07.CB.20

Group : 07

Subgroup : CB

Nickel-Strunz Number	Mineral Name	Formula
07.CB.20	pentahydrite	Mg(SO4)·5(H2O)
07.CB.20	siderotil	Fe+2(SO4)·5(H2O)

Specimens

Localities

Uses