Willemite

Overview

Zn2SiO4
Fluorescence: green under SW and LW	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.9-4.2 g/cc
Hardness - Mohs	Willemite - 5.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, yellow, green, red brown, black
Streak	white

Crystal Properties

Property	Value
Crystal structure	trigonal - rhombohedral
Cleavage	poor
Tenacity	-
Fracture	uneven
Luster	vitreous, resinous

Similar Minerals

Dana Number : 51.01.01.02

Class: 51

Group: 51.01

Subgroup: 51.01.01 - phenakite

Dana Number	Mineral Name	Formula
51.01.01.01	phenakite	Be2SiO4
51.01.01.02	willemite	Zn2SiO4

Nickel-Strunz Number : 09.AA.05

Group : 09

Subgroup : AA

Nickel-Strunz Number	Mineral Name	Formula
09.AA.05	phenakite	Be2SiO4
09.AA.05	willemite	Zn2SiO4

Specimens

Localities

Uses