Solid phase
Official name
Carbon dioxide ice
Secondary names
CO2 ice; dry ice
Type
Family
molecular solid
Class
non polar molecular solid
Compound type
inorganic molecular solid
Chemical composition
Formula
CO2
Chemical formula
CO2
Elemental formula
C O2
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
CO2 Carbon dioxide molecule 1 1.0 1 pure main
Chemical bonds
  Bond Number
=C=O 2
Class
molecular solids with apolar molecules (01)
Type
with polyatomic inorganic apolar molecules (01.07)
Phase name
Cubic CO2-I ice
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
diploidal
Crystal class symbol
m-3 (Th)
Crystal spacegroup
Pa-3
Molar mass
44.01 g/mol
Density
1.562 g/cm3
State NTP
gas
Phase transitions
Phase transition type Other phases Temperature - Pressure
triple point solid-liquid-gas liquid CO2, gas 216.58 K (5.185 b)
solid-solid CO2−III ice < 440 K (11.5 GPa)
solid-solid CO2−II ice 440 - 460 K (11.5 GPa)
solid-solid CO2−IV ice 460 - 620 K (11 GPa)
solid-solid CO2−VII ice 216 K (5 b)
Refringence type
isotropic
Pure color
colorless
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