Gormanite

Overview

Fe+23Al4(PO4)4(OH)6·2(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.13 g/cc
Hardness - Mohs	Gormanite - 4.0-5.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	blue green
Streak	light green

Crystal Properties

Property	Value
Crystal structure	triclinic - pseudomonoclinic
Cleavage	indistinct
Tenacity	brittle
Fracture	splintery
Luster	vitreous, glassy

Similar Minerals

Dana Number : 42.09.02.02

Class: 42

Group: 42.09

Subgroup: 42.09.02 - souzalite

Dana Number	Mineral Name	Formula
42.09.02.02	gormanite	Fe+23Al4(PO4)4(OH)6·2(H2O)

Nickel-Strunz Number : 08.DC.45

Group : 08

Subgroup : DC

Nickel-Strunz Number	Mineral Name	Formula
08.DC.45	gormanite	Fe+23Al4(PO4)4(OH)6·2(H2O)

Specimens

Localities

Uses