Solid phase
Official name
Maghemite
Secondary names
Gamma maghemite; Gamma-Fe2O3
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide-hydroxide
Chemical composition
Formula
$Fe^{3+}_2O_3$
Chemical formula
Fe2O3
Elemental formula
(Fe3+)2 O3
Isotope mixture type
terrestrial abundance
10.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Fe^{3+}$ Iron(III) cation element 2 0.4 1.0 constituent element main
$O$ Oxygen element 3 0.6 1.0 constituent element main
Class
tridimensional covalent networks (11)
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
tetartoidal
Crystal class symbol
23 (T)
Crystal spacegroup
P2(1)3
Molar mass
159.69 $g/mol$
Density
4.9 $g/cm^3$
State NTP
solid
Refringence type
isotropic
Refraction index $n_{\alpha}$
2.73
Pure color
brown
Color
Brown, bluish black, dark brown
Diaphaneity
opaque
Luster
metallic
Links