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Is pressure the key to hydrogen ordering ice IV?

Rosu-Finsen, A; Salzmann, CG; (2022) Is pressure the key to hydrogen ordering ice IV? Chemical Physics Letters , 789 , Article 139325. 10.1016/j.cplett.2021.139325. Green open access

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Abstract

Hydrochloric-acid-doped ice IV prepared at increasing pressures leads to growing endotherms observed with ambient pressure calorimetry. The endotherms are irreversible suggesting three possible scenarios for their origins: (1) a weakly hydrogen-ordered counterpart of ice IV is formed, but ambient pressure favours hydrogen-disordered ice IV, (2) increased pressure creates increased strain within the crystal structure of the ice, which is released upon heating yielding the endotherms or (3) the endotherms are kinetic overshoot effects related to the underlying orientational glass transition. X-ray diffraction cannot distinguish between these scenarios. Recent controversies regarding the preparation of ice IV are also discussed.

Type: Article
Title: Is pressure the key to hydrogen ordering ice IV?
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cplett.2021.139325
Publisher version: https://doi.org/10.1016/j.cplett.2021.139325
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Ice, Doping, Pressure, Hydrogen ordering, Calorimetry
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
URI: https://discovery.ucl.ac.uk/id/eprint/10142511
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