Cornwallite

Overview

Cu5(AsO4)2(OH)4·(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.17 g/cc
Hardness - Mohs	Cornwallite - 4.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	green
Streak	green

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	distinct
Tenacity	brittle
Fracture	conchoidal
Luster	resinous

Similar Minerals

Dana Number : 41.04.02.02

Class: 41

Group: 41.04

Subgroup: 41.04.02 - cornubite

Dana Number	Mineral Name	Formula
41.04.02.02	cornwallite	Cu5(AsO4)2(OH)4·(H2O)

Nickel-Strunz Number : 08.BD.05

Group : 08

Subgroup : BD

Nickel-Strunz Number	Mineral Name	Formula
08.BD.05	cornwallite	Cu5(AsO4)2(OH)4·(H2O)
08.BD.05	pseudomalachite	Cu5(PO4)2(OH)4
08.BD.05	reichenbachite	Cu+25(PO4)2(OH)4

Specimens

Localities

Uses