Brownmillerite

Overview

Ca2(Al,Fe+3)2O5
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.76 g/cc
Hardness - Mohs	Brownmillerite - -  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown
Streak	light brown

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	-
Tenacity	-
Fracture	-
Luster	-

Similar Minerals

Dana Number : 07.11.02.01

Class: 07

Group: 07.11

Subgroup: 07.11.02 - brownmillerite

Dana Number	Mineral Name	Formula
07.11.02.01	brownmillerite	Ca2(Al,Fe+3)2O5
07.11.02.02	srebrodolskite	Ca2Fe+32O5

Nickel-Strunz Number : 04.AC.10

Group : 04

Subgroup : AC

Nickel-Strunz Number	Mineral Name	Formula
04.AC.10	brownmillerite	Ca2(Al,Fe+3)2O5
04.AC.10	srebrodolskite	Ca2Fe+32O5

Specimens

Localities

Uses