Cumengite

Overview

Cu20Pb21Cl42(OH)40·6(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.67 g/cc
Hardness - Mohs	Cumengite - 2.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	blue
Streak	blue

Crystal Properties

Property	Value
Crystal structure	tetragonal - ditetragonal dipyramidal
Cleavage	distinct
Tenacity	-
Fracture	brittle
Luster	adamantine

Similar Minerals

Dana Number : 10.06.07.01

Class: 10

Group: 10.06

Subgroup: 10.06.07 - cumengeite

Dana Number	Mineral Name	Formula
10.06.07.01	cumengite	Cu20Pb21Cl42(OH)40·6(H2O)

Nickel-Strunz Number : 03.DB.20

Group : 03

Subgroup : DB

Nickel-Strunz Number	Mineral Name	Formula
03.DB.20	cumengite	Cu20Pb21Cl42(OH)40·6(H2O)

Specimens

Localities

Uses