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Structure of a new dense amorphous ice

Finney, JL; Bowron, DT; Soper, AK; Loerting, T; Mayer, E; Hallbrucker, A; (2002) Structure of a new dense amorphous ice. PHYS REV LETT , 89 (20) , Article 205503. 10.1103/PhysRevLett.89.205503. Green open access

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Abstract

The detailed structure of a new dense amorphous ice, VHDA, is determined by isotope substitution neutron diffraction. Its structure is characterized by a doubled occupancy of the stabilizing interstitial location that was found in high density amorphous ice, HDA. As would be expected for a thermally activated unlocking of the stabilizing "interstitial," the transition from VHDA to LDA (low-density amorphous ice) is very sharp. Although its higher density makes VHDA a better candidate than HDA for a physical manifestation of the second putative liquid phase of water, as for the HDA case, the VHDA to LDA transition also appears to be kinetically controlled.

Type: Article
Title: Structure of a new dense amorphous ice
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.89.205503
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.89.205503
Language: English
Keywords: PRESSURE-INDUCED AMORPHIZATION, LIQUID WATER, 1ST-ORDER TRANSITION, RAMAN-SPECTRA, X-RAY, 77 K, DIFFRACTION, BEHAVIOR, H2O, IH
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 Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/9516
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