Solid phase
Official name
Nickel(II) oxide
Secondary names
Nickel monoxide; Oxonickel; Bunsenite
CAS number
1313-99-1
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide
Chemical composition
Formula
NiO
Chemical formula
NiO
Elemental formula
Ni O
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Ni$ Nickel element 1 0.5 1 constituent element main
$O$ Oxygen element 1 0.5 1 constituent element main
Composition comments
NiO is often non-stoichiometric
Chemical bonds
  Bond Number
$-Ni-O-$
Class
tridimensional covalent networks (11)
Type
one metal and one non-metal (or metalloid) tridimensional networks (11.04)
Equivalent mineral
Bunsenite
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Fm-3m
Molar mass
74.693 $g/mol$
Density
6.67 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 1955°C (2228 K)
Refringence type
isotropic
Refringence sign
no
Birefringence
0
Refraction index $n_{\alpha}$
2.182
Pure color
green
Color
green to black
Diaphaneity
translucent to opaque
Luster
vitreous
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