Mineral phase
IMA name
Romarchite
CAS number
21651-19-4
Type
Class
non-silicate mineral
Compound type
oxide
Chemical composition
Formula
$SnO$
Chemical formula
SnO
Elemental formula
Sn O
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Sn$ Tin element 1 constituent element main
$O$ Oxygen element 1 constituent element main
Chemical bonds
  Bond Number
$-Sn-O-$ 2
Oxides
Formula $SnO$
Mass fraction (%) 100.0

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 large cations (+/- smaller ones) (04.AC)
Code
04.AC.20

Dana

Major class
oxides and hydroxides (III)
Class
simple oxides (04)
Type
with a cation charge of 2+ (A++O) (04.02)
Group
-Romarchite- group (04.02.05)
Code
04.02.05.01
Phase type
crystalline
Crystal system
tetragonal
Crystal class
ditetragonal-dipyramidal
Crystal class symbol
4/m (C4h)
Crystal spacegroup
P4/nmm
Molar mass
134.71 $g/mol$
Density
6.45 $g/cm^3$
State NTP
solid
Refringence type
uniaxial
Refraction index $n_o$ (w)
n(calc.) = 1.9 - from gladstone-dale relationship
Pure color
black
Color
black
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