Bertrandite

Overview

Be4Si2O7(OH)2
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.59-2.60 g/cc
Hardness - Mohs	Bertrandite - 6.0-7.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, light yellow
Streak	white

Crystal Properties

Property	Value
Crystal structure	orthorhombic - pyramidal
Cleavage	perfect
Tenacity	brittle
Fracture	brittle
Luster	vitreous, glassy

Similar Minerals

Dana Number : 56.01.01.01

Class: 56

Group: 56.01

Subgroup: 56.01.01 - bertrandite

Dana Number	Mineral Name	Formula
56.01.01.01	bertrandite	Be4Si2O7(OH)2

Nickel-Strunz Number : 09.BD.05

Group : 09

Subgroup : BD

Nickel-Strunz Number	Mineral Name	Formula
09.BD.05	bertrandite	Be4Si2O7(OH)2

Specimens

Localities

Uses