Solid phase
Official name
Tin(II) oxide
Secondary names
Stannous oxide
CAS number
21651-19-4
Type
Family
metallic solid
Class
pseudometal (semi-conductor)
Compound type
oxide
Chemical composition
Formula
$SnO$
Chemical formula
SnO
Elemental formula
Sn O
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Sn$ Tin element 1 0.5 1 constituent element main
$O$ Oxygen element 1 0.5 1 constituent element main
Chemical bonds
  Bond Number
$-Sn-O-$ 2
Class
pseudometals (14)
Type
homovalent bilayer pseudometals (14.02)
Equivalent mineral
Romarchite
Phase name
α-SnO
Phase type
crystalline
Crystal system
tetragonal
Crystal class
ditetragonal-dipyramidal
Crystal class symbol
4/m (C4h)
Crystal spacegroup
P4/nmm
Molar mass
134.709 $g/mol$
Density
6.45 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 1080°C (1350 K)
Refringence type
uniaxial
Refraction index $n_{\alpha}$
~1.9
Pure color
black
Color
black
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