Ice XV: A New Thermodynamically Stable Phase of Ice

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Ice XV: A New Thermodynamically Stable Phase of Ice

Salzmann, CG; Radaelli, PG; Mayer, E; Finney, JL; (2009) Ice XV: A New Thermodynamically Stable Phase of Ice. PHYS REV LETT , 103 (10) , Article 105701. 10.1103/PhysRevLett.103.105701. Green open access

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Abstract

A new phase of ice, named ice XV, has been identified and its structure determined by neutron diffraction. Ice XV is the hydrogen-ordered counterpart of ice VI and is thermodynamically stable at temperatures below similar to 130 K in the 0.8 to 1.5 GPa pressure range. The regions of stability in the medium pressure range of the phase diagram have thus been finally mapped, with only hydrogen-ordered phases stable at 0 K. The ordered ice XV structure is antiferroelectric (P1), in clear disagreement with recent theoretical calculations predicting ferroelectric ordering (Cc).

Type:	Article
Title:	Ice XV: A New Thermodynamically Stable Phase of Ice
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.103.105701
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.103.105701
Language:	English
Additional information:	© 2009 The American Physical Society
Keywords:	NEUTRON POWDER DIFFRACTION, LOW-TEMPERATURES, RAMAN-SPECTRA, VI, TRANSITION, PREDICTION
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI:	https://discovery.ucl.ac.uk/id/eprint/98947