Solid phase
Official name
Cobalt(II) oxide
Secondary names
Cobaltous oxide; Cobalt monooxide; Oxocobalt; Monocobalt oxide; CoO
CAS number
1307-96-6
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide
Chemical composition
Formula
$CoO$
Chemical formula
CoO
Elemental formula
Co O
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Co$ Cobalt element 1 0.5 1 constituent element main
$O$ Oxygen element 1 0.5 1 constituent element main
Chemical bonds
  Bond Number
$-Co-O-$ 6
Class
tridimensional covalent networks (11)
Type
one metal and one non-metal (or metalloid) tridimensional networks (11.04)
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
74.9326 $g/mol$
Density
6.45 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid CoO 1933°C (2206 K)
Refringence type
isotropic
Pure color
green
Color
dark gray, black, olive green, red
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