Water (data Page) - Table of Various Forms of Ice

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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