Fettelite

Overview

(Ag6As2S7)(Ag10HgAs2S8)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	6.29 g/cc
Hardness - Mohs	Fettelite - 3.5-4.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	dark violet, scarlet red
Streak	vermillion

Crystal Properties

Property	Value
Crystal structure	monoclinic - sphenoidal
Cleavage	perfect
Tenacity	brittle
Fracture	irregular
Luster	adamantine

Similar Minerals

Dana Number : 03.02.06.02

Class: 03

Group: 03.02

Subgroup: 03.02.06 - aroubisite

Dana Number	Mineral Name	Formula
03.02.06.02	fettelite	(Ag6As2S7)(Ag10HgAs2S8)

Nickel-Strunz Number : 02.LA.30

Group : 02

Subgroup : LA

Nickel-Strunz Number	Mineral Name	Formula
02.LA.30	fettelite	(Ag6As2S7)(Ag10HgAs2S8)

Specimens

Localities

Uses