Franckeite

Overview

(Pb,Sn)6Fe+2Sn2Sb2S14
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	5.5-5.9 g/cc
Hardness - Mohs	Franckeite - 2.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	gray, black
Streak	gray black

Crystal Properties

Property	Value
Crystal structure	triclinic - pinacoidal
Cleavage	perfect
Tenacity	flexible
Fracture	flexible
Luster	metallic

Similar Minerals

Dana Number : 03.01.04.02

Class: 03

Group: 03.01

Subgroup: 03.01.04 - cylindrite

Dana Number	Mineral Name	Formula
03.01.04.01	cylindrite	Pb3Sn4FeSb2S14
03.01.04.02	franckeite	(Pb,Sn)6Fe+2Sn2Sb2S14

Nickel-Strunz Number : 02.HF.25b

Group : 02

Subgroup : HF

Nickel-Strunz Number	Mineral Name	Formula
02.HF.25b	franckeite	(Pb,Sn)6Fe+2Sn2Sb2S14

Specimens

Localities

Uses