Class

non-silicate mineral

Compound type

oxide-hydroxide

Oxides

Formula	$Fe_{2}O_{3}$
Mass fraction (%)	100.0

Strunz

Class

oxides - hydroxides - arsenites (04)

Division

metal:oxygen = 3:4 and similar (04.B)

Family

with only medium-sized cations (04.BB)

Code

04.BB.15

Dana

Major class

oxides and hydroxides (III)

Class

simple oxides (04)

Type

with a cation charge of 3+ (A+++2O3) (04.03)

Group

-Maghemite- group (04.03.07)

Code

04.03.07.01

Phase name

gamma-Fe2O3

Phase type

crystalline

Crystal system

isometric (cubic)

Crystal class

gyroidal

Crystal class symbol

432 (O)

Crystal spacegroup

P4(1)32

Crystal sites

Label	Nb	Type	Wp	Specie	Specie coordinence	Specie occupancy	Specie oxidation state
Fe1	1	main		$Fe^{3+}$	tetrahedral IV	1.0	3
Fe2	2	main		$Fe^{3+}$	octahedral VI	0.833	3

Composition order

ordered

Comments

also group $P4_332$

Molar mass

260.885 $g/mol$

Density

4.86 (calc.) $g/cm^3$

Refringence type

isotropic

Refringence sign

no

Birefringence

0

Color

dark brown

Diaphaneity

opaque

Luster

metallic