Ice II

Ice II is a rhombohedral crystalline form of ice with highly ordered structure. It is formed from ice Ih by compressing it at temperature of 198 K at 300 MPa or by decompressing ice V. When heated it undergoes transformation to ice III.

Ordinary water ice is known as ice Ih, (in the Bridgman nomenclature). Different types of ice, from ice II to ice XIV, have been created in the laboratory at different temperatures and pressures.

It is thought that icy moons like Jupiter's Ganymede may be largely comprised of ice II.


  • Chaplin, Martin Ice-two structure. Water Structure and Science. Retrieved on 2008-01-02..

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