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
I_h	0.92	hexagonal	Lq, Vap, I_h	0.01	0.000612
			Lq, I_h, III	−22.0	207.5
			I_h, II, III	−34.7	212.9
I_c	0.92	cubic
II	1.17	rhombohedral	I_h, II, III	−34.7	212.9
			II, III, V	−24.3	344.3
			II, V, VI	−55 (est)	620
III	1.14	tetragonal	Lq, I_h, III	−22.0	207.5
			Lq, III, V	−17	346.3
			I_h, 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
VIII	1.46	tetragonal	VII, VIII, X	−173	62000
IX	1.16	tetragonal
X	2.46	cubic	VII, VIII, X	−173	62000
XI‡	0.92	orthorhombic	Vap, I_h, XI	−201.5	0 (expected)
XII	1.29	tetragonal
XIII	1.23	monoclinic
XIV	1.29	orthorhombic

‡

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