Leifite

Overview

Na2(Si,Al,Be)7(O,OH,F)14
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.57 g/cc
Hardness - Mohs	Leifite - 6  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, white
Streak	white

Crystal Properties

Property	Value
Crystal structure	trigonal - hexagonal scalenohedral
Cleavage	good
Tenacity	brittle
Fracture	brittle
Luster	vitreous, glassy

Similar Minerals

Dana Number : 78.07.10.01

Class: 78

Group: 78.07

Subgroup: 78.07.10 - leifite

Dana Number	Mineral Name	Formula
78.07.10.01	leifite	Na2(Si,Al,Be)7(O,OH,F)14
78.07.10.03	eirikite	KNa6Be2(Si15Al3)O39F2

Nickel-Strunz Number : 09.EH.25

Group : 09

Subgroup : EH

Nickel-Strunz Number	Mineral Name	Formula
09.EH.25	eirikite	KNa6Be2(Si15Al3)O39F2
09.EH.25	leifite	Na2(Si,Al,Be)7(O,OH,F)14

Specimens

Localities

Uses