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Deep-Glassy Ice VI Revealed with a Combination of Neutron Spectroscopy and Diffraction

Rosu-Finsen, A; Amon, A; Armstrong, J; Fernandez-Alonso, F; Salzmann, CG; (2020) Deep-Glassy Ice VI Revealed with a Combination of Neutron Spectroscopy and Diffraction. The Journal of Physical Chemistry Letters , 11 (3) pp. 1106-1111. 10.1021/acs.jpclett.0c00125. Green open access

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Abstract

The recent discovery of a low-temperature endotherm upon heating hydrochloric-acid-doped ice VI has sparked a vivid controversy. The two competing explanations aiming to explain its origin range from a new distinct crystalline phase of ice to deep-glassy states of the well-known ice VI. Problems with the slow kinetics of deuterated phases have been raised, which we circumvent here entirely by simultaneously measuring the inelastic neutron spectra and neutron diffraction data of H2O samples. These measurements support the deep-glassy ice VI scenario and rule out alternative explanations. Additionally, we show that the crystallographic model of D2O ice XV, the ordered counterpart of ice VI, also applies to the corresponding H2O phase. The discovery of deep-glassy ice VI now provides a fascinating new example of ultrastable glasses that are encountered across a wide range of other materials.

Type: Article
Title: Deep-Glassy Ice VI Revealed with a Combination of Neutron Spectroscopy and Diffraction
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acs.jpclett.0c00125
Publisher version: https://doi.org/10.1021/acs.jpclett.0c00125
Language: English
Additional information: This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. https://creativecommons.org/licenses/by/4.0/
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/10091216
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