Ice VII: Difference between revisions
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'''Ice VII''' is a [[cubic]] crystalline form of [[ice]] formed by lowering water to ambient temperatures at pressures above |
'''Ice VII''' is a [[cubic]] crystalline form of [[ice]] formed by lowering water to ambient temperatures at pressures above 2.1[[GPa]]<ref name="Johari et al">G.P. Johari, A.Lavergne and E.Whalley, Journal of Chemical Physics Vol 61 p4292 (1974)</ref>. The [[hydrogen]] atom positions are disordered and the [[hydrogen bond]]s form two interpenetrating lattices. It exhibits [[Debye relaxation]]. The proton-ordered form of ice VII is [[ice VIII]]. |
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Ordinary water ice is known as [[ice Ih|ice I<sub>h</sub>]], (in the [[Percy Williams Bridgman|Bridgman]] nomenclature). Different types of ice, from ice II to ice XIV, have been created in the laboratory at different temperatures and pressures. |
Ordinary water ice is known as [[ice Ih|ice I<sub>h</sub>]], (in the [[Percy Williams Bridgman|Bridgman]] nomenclature). Different types of ice, from ice II to ice XIV, have been created in the laboratory at different temperatures and pressures. |
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Revision as of 12:23, 22 February 2008
Ice VII is a cubic crystalline form of ice formed by lowering water to ambient temperatures at pressures above 2.1GPa[1]. The hydrogen atom positions are disordered and the hydrogen bonds form two interpenetrating lattices. It exhibits Debye relaxation. The proton-ordered form of ice VII is ice VIII.
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.
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The crystal structure of ice VII
References
- Chaplin, Martin (2007-10-26). "Ice-seven and ice-ten structures". Water Structure and Science. Retrieved 2008-01-02.
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- ^ G.P. Johari, A.Lavergne and E.Whalley, Journal of Chemical Physics Vol 61 p4292 (1974)