Table of Various Forms of Ice
Properties of various forms of ice | |||||
---|---|---|---|---|---|
Ice form |
Density g/cm3 |
Crystal structure |
Triple points |
TP temp °C | TP pressure MPa |
Ih | 0.92 | hexagonal | Lq, Vap, Ih | 0.01 | 0.000612 |
Lq, Ih, III | −22.0 | 207.5 | |||
Ih, II, III | −34.7 | 212.9 | |||
Ic | 0.92 | cubic | |||
II | 1.17 | rhombohedral | Ih, II, III | −34.7 | 212.9 |
II, III, V | −24.3 | 344.3 | |||
II, V, VI | −55 (est) | 620 | |||
III | 1.14 | tetragonal | Lq, Ih, III | −22.0 | 207.5 |
Lq, III, V | −17 | 346.3 | |||
Ih, II, III | −34.7 | 212.9 | |||
II, III, V | −24.3 | 344.3 | |||
IV | 1.27 | rhombohedral | |||
V | 1.23 | monoclinic | Lq, III, V | −17 | 346.3 |
Lq, V, VI | 0.16 | 625.9 | |||
II, III, V | −24.3 | 344.3 | |||
II, V, VI | −55 (est) | 620 | |||
VI | 1.31 | tetragonal | Lq, V, VI | 0.16 | 625.9 |
Lq, VI, VII | 81.6 | 2200 | |||
II, V, VI | −55 (est) | 620 | |||
VI, VII, VIII | ≈5 | 2100 | |||
VII | 1.50 | cubic | Lq, VI, VII | 81.6 | 2200 |
VI, VII, VIII | ≈5 | 2100 | |||
VII, VIII, X | −173 | 62000 | |||
VIII | 1.46 | tetragonal | VI, VII, VIII | ≈5 | 2100 |
VII, VIII, X | −173 | 62000 | |||
IX | 1.16 | tetragonal | |||
X | 2.46 | cubic | VII, VIII, X | −173 | 62000 |
XI‡ | 0.92 | orthorhombic | Vap, Ih, XI | −201.5 | 0 (expected) |
XII | 1.29 | tetragonal | |||
XIII | 1.23 | monoclinic | |||
XIV | 1.29 | orthorhombic |
‡
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