Mineral phase
IMA name
Ferropericlase
Secondary names
magnesiowüstite
Type
Class
non-silicate mineral
Compound type
oxide-hydroxide
Chemical composition
Formula
$(Mg,Fe)O$
Chemical formula
(Mg,Fe)O
Elemental formula
(Mg)0-1 (Fe2+)0-1 O
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Mg$ Magnesium element 0 - 1 constituent element main
$Fe^{2+}$ Iron(II) cation element 0 - 1 constituent element main
$O$ Oxygen element 1 constituent element main

Strunz

Class
oxides - hydroxides - arsenites (04)
Division
metal:oxygen = 2.1 and 1:1 (04.A)
Family
M:O = 1:1 (and up to 1:1.25) with small to medium-sized cations only (04.AB)
Code
04.AB.25

Dana

Major class
oxides and hydroxides (III)
Class
simple oxides (04)
Type
with a cation charge of 2+ (A++O) (04.02)
Group
Periclase group (Isometric, Fm3m) (04.02.01)
End-members
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
40.3 - 71.85 $g/mol$
Density
3.67 - 5.88 $g/cm^3$
State NTP
solid
Refringence type
isotropic
Refraction index $n_{\alpha}$
1.74 - 2.13
Pure color
various
Color
various
Diaphaneity
transparent to opaque
Luster
various
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