Semseyite

Overview

Pb9Sb8S21
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	5.8-6.1 g/cc
Hardness - Mohs	Semseyite - 2.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	black, gray
Streak	black

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	good
Tenacity	brittle
Fracture	brittle
Luster	metallic

Similar Minerals

Dana Number : 03.06.20.04

Class: 03

Group: 03.06

Subgroup: 03.06.20 - fuloppite

Dana Number	Mineral Name	Formula
03.06.20.01	fülöppite	Pb3Sb8S15
03.06.20.02	plagionite	Pb5Sb8S17
03.06.20.04	semseyite	Pb9Sb8S21
03.06.20.05	rayite	(Ag,Tl)2Pb8Sb8S21

Nickel-Strunz Number : 02.HC.10d

Group : 02

Subgroup : HC

Nickel-Strunz Number	Mineral Name	Formula
02.HC.10d	rayite	(Ag,Tl)2Pb8Sb8S21
02.HC.10d	semseyite	Pb9Sb8S21

Specimens

Localities

Uses