Helvite

Overview

Mn+24Be3(SiO4)3S
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.20-3.44 g/cc
Hardness - Mohs	Helvite - 6.0-6.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	yellow, brown, red, gray yellow, yellow green
Streak	white

Crystal Properties

Property	Value
Crystal structure	isometric - hextetrahedral
Cleavage	distinct
Tenacity	brittle
Fracture	uneven
Luster	vitreous, resinous

Similar Minerals

Dana Number : 76.02.04.01

Class: 76

Group: 76.02

Subgroup: 76.02.04 - helvine

Dana Number	Mineral Name	Formula
76.02.04.01	helvine	Mn+24Be3(SiO4)3S
76.02.04.01	helvite	Mn+24Be3(SiO4)3S
76.02.04.02	danalite	Fe+24Be3(SiO4)3S
76.02.04.03	genthelvite	Zn4Be3(SiO4)3S

Nickel-Strunz Number : 09.FB.10

Group : 09

Subgroup : FB

Nickel-Strunz Number	Mineral Name	Formula
09.FB.10	danalite	Fe+24Be3(SiO4)3S
09.FB.10	genthelvite	Zn4Be3(SiO4)3S
09.FB.10	hackmanite	Na8Al6Si6O24Cl2
09.FB.10	haüyne	(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
09.FB.10	helvine	Mn+24Be3(SiO4)3S
09.FB.10	helvite	Mn+24Be3(SiO4)3S
09.FB.10	lazurite	Na3Ca(Al3Si3O12)S
09.FB.10	nosean	Na8Al6Si6O24(SO4)
09.FB.10	sodalite	Na8Al6Si6O24Cl2
09.FB.10	tugtupite	Na4AlBeSi4O12Cl
09.FB.10	vladimirivanovite	Na6Ca2(Al6Si6O24)(SO4,S3,S2,Cl)2·(H2O)

Specimens

Localities

Uses