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Issue 23, 2012
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Pressure amorphized ices – an atomistic perspective

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We offer our viewpoint on the nature of amorphous ices produced by pressurization of crystalline ice Ih and the inter-relationship between them from an atomistic perspective. We argue that the transformation of high density amorphous (HDA) ice from crystalline ice is due to a mechanical process arising from the instability of the ice Ih structure. The densification of HDA upon thermal annealing under pressure is a relaxation process. The conversion of the densified amorphous ice to a lower density form (LDA) upon the release of pressure can be attributed to a similar process. It is speculated that amorphous ices are metastable frustrated structures due to the large activation barriers associated with proton reorientation in the formation of the underlying stable crystalline ice polymorphs.

Graphical abstract: Pressure amorphized ices – an atomistic perspective

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Publication details

The article was received on 19 Jan 2012, accepted on 17 Apr 2012 and first published on 23 Apr 2012

Article type: Perspective
DOI: 10.1039/C2CP40201G
Phys. Chem. Chem. Phys., 2012,14, 8255-8263

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    Pressure amorphized ices – an atomistic perspective

    J. S. Tse and D. D. Klug, Phys. Chem. Chem. Phys., 2012, 14, 8255
    DOI: 10.1039/C2CP40201G

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