Phys. Rev. B 70, 144113 (2004) [4 pages]

Anomalous transformations in ice VIII

Abstract

References

Citing Articles (5)

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Dennis D. Klug¹, John S. Tse¹, Zhenxian Liu², Xavier Gonze³, and Russell J. Hemley²
¹Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Canada K1A 0R6
²Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA
³Unité de Physico-Chemie et de Physique des Matériaux, Université Catholique de Louvain, Louvain-la-Neuve, Belgium

Received 15 July 2004; published 29 October 2004

Synchrotron far-infrared spectroscopy and linear response density-functional theory provide a new interpretation of the unique low-temperature isostructural transition in ice VIII. This study shows that it is a first-order thermodynamic transformation. Previously unexplained discrepancies have been resolved: the transformation between two forms of ice VIII arises from subtle phonon instabilities with an isostructural movement of molecules in the ice VIII structure.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.70.144113

DOI:

10.1103/PhysRevB.70.144113

PACS:

61.50.Ks, 63.20.Dj, 64.70.Kb

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Phys. Rev. B 70, 144113 (2004) [4 pages]

Anomalous transformations in ice VIII