Water ice Ih | SSHADE

Processing math: 100%

Solid phase

Official name: Water ice Ih

Name and identifiers

Secondary names: Ice Ih; Hexagonal ice; Frozen water; Water ice
CAS number: 7732-18-5

Family: molecular solid
Class: hydrogen bonded molecular solid
Compound type: inorganic molecular solid

Chemical composition

Formula: $H_2O$
Chemical formula: H2O
Elemental formula: H2 O
Isotope mixture type: terrestrial abundance

2.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$H_2O$	Water	molecule	1	1.0	1.0	pure	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$R-OH$	2

Chemical bonds

	Bond	Number
	$-O \dots H-$	4
	$-O-H$	2

Oxides composition

Oxides

Formula	$H_{2}O$
Mass fraction (%)	1.0

Class: molecular solids with hydrogen bonded molecules (03)
Type: homomolecular H-bonded solids (03.01)
Group: H2O polymorphs (03.01.01)
Code: 03.01.01.01

Associated phases

Equivalent liquid: Liquid water

Crystallography

Phase name: H2O Ih
Phase type: crystalline
Crystal system: hexagonal
Crystal class: dihexagonal-dipyramidal
Crystal class symbol: 6/mmm (D6h)
Crystal spacegroup: P6(3)/mmc

Physical properties

Molar mass: 18.0153 $g/mol$
Density: 0.917 (273 K) - 0.928 (90 K) $g/cm^3$

Thermodynamical properties

State NTP

liquid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
triple point solid-liquid-gas	liquid water, gas	273.16 K (611.66Pa)
solid-liquid	liquid water	273.15 K (100 kPa)
solid-solid	water ice Ic	~220-240 K (0-200 MPa)

Optical properties

Refringence type: uniaxial
Refringence sign: unknown
Birefringence: 0.01
Refraction index $n_{\alpha}$: 1.31
Refraction index $n_{\beta}$: 1.33
Pure color: colorless
Color: light blue (when thick)
Diaphaneity: transparent
Luster: vitreous

Links and Publications

Links