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
$CO_2$
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
$CO_2$ Carbon dioxide molecule 1 1.0 1.0 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
trigonal
Crystal spacegroup
P4(2)/mnm
Molar mass
44.01 $g/mol$
Density
1.562 $g/cm^3$
State NTP
gas
Phase transitions
Phase transition type Other phases Temperature - Pressure
triple point solid-liquid-gas liquid $CO_2$, gas 216.58 K (5.185 b)
solid-solid $CO_2-III$ ice < 440 K (11.5 GPa)
solid-solid $CO_2-II$ ice 440 - 460 K (11.5 GPa)
solid-solid $CO_2-IV$ ice 460 - 620 K (11 GPa)
solid-solid $CO_2-VII$ ice 216 K (5 b)
Refringence type
isotropic
Pure color
colorless
Links