Constituent
Name
SO2 crystalline I
Official name
Sulfur dioxide phase I
Family
molecular solid
Class
polar molecular solid
Compound type
inorganic molecular solid
Comments
natural istopic composition, but possible fractionation
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0 $\pm$ 0.0001
Mole fraction
1.0
Abundance comments
H2O (< 0.5 ppm in crystal) and CO2 (< 0.7 ppm in crystal) impurity in SO2 gas and adsorbed - to be quantified in film
Chemical composition
Formula
$SO_2$
Chemical formula
SO2
Elemental formula
S O2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$SO_2$ Sulfur dioxide molecule 1 1.0 1 pure main
Chemical bonds
  Bond Number Relevance
$=S=O$ 2 main
Class
molecular solids with polar molecules (02)
Type
with polyatomic inorganic polar molecules (02.02)
Phase name
Phase I
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
pyramidal
Crystal class symbol
mm2 (C2v)
Crystal spacegroup
Aba2
Texture
polycrystalline
Molar mass
64.0635971 $g/mol$
Density
1.98 (77K) $g/cm^3$
Refringence type
biaxial
Refraction index $n_{\alpha}$
~1.50
Diaphaneity
transparent
Luster
vitreous