Solid phase
Official name
Synthetic cobalt(II,III) oxide
Secondary names
cobalt(II) dicobalt(III) oxide; cobalt oxide; tricobalt tetroxide
CAS number
1308-06-1
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide-hydroxide
Chemical composition
Formula
$Co_3O_4$
Chemical formula
Co3O4
Elemental formula
Co3 O4
Isotope mixture type
terrestrial abundance
14.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Co$ Cobalt element 3 0.42857142857142855 1 pure main
$O$ Oxygen element 4 0.5714285714285714 1 pure main
Class
tridimensional covalent networks (11)
Type
metal homonuclear tridimensional networks (elemental) (11.02)
Phase name
Cobalt(II,III) oxide
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fd-3m
Comments
normal spinel structure
Molar mass
240.80 $g/mol$
Density
6.11 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 1168K (895°C)
Phase transitions comments
decomposes at 1170K
Refringence type
isotropic
Pure color
black
Color
black
Diaphaneity
opaque
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