Rotational dynamics of plastic ice

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A plastic phase predicted to exist between crystalline ice VII and liquid water has been investigated. The present work focuses on the dynamics of the water molecules in the phases at high temperature and pressure, i.e. ice VII, plastic ice, and liquid water. The hydrogen-bond correlation function providing the lifetime of hydrogen bonds is compared to the reorientational correlation function to examine a relation between a rotation of an individual molecule and an energetic relaxation process. The hydrogen-bond correlation function of plastic ice decays in a way similar to liquid but it converges to a finite value as seen in ice VII, reflecting the rotational motion of the water molecule at the fixed location. In addition, the relaxation times of the two correlation functions for plastic ice resemble one another, confirming the fact that only the rotational motion invokes the hydrogen-bond rearrangements in plastic ice.

Original languageEnglish
Article numberSA023
JournalJournal of the Physical Society of Japan
Volume81
Issue numberSUPPL. A
Publication statusPublished - Sep 2012

Fingerprint

ice
plastics
hydrogen bonds
water
liquids
pressure ice
molecules
relaxation time
life (durability)
decay

Keywords

  • Ice
  • Plastic phase
  • Water

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Rotational dynamics of plastic ice. / Himoto, Kazuhiro; Matsumoto, Masakazu; Tanaka, Hideki.

In: Journal of the Physical Society of Japan, Vol. 81, No. SUPPL. A, SA023, 09.2012.

Research output: Contribution to journalArticle

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AB - A plastic phase predicted to exist between crystalline ice VII and liquid water has been investigated. The present work focuses on the dynamics of the water molecules in the phases at high temperature and pressure, i.e. ice VII, plastic ice, and liquid water. The hydrogen-bond correlation function providing the lifetime of hydrogen bonds is compared to the reorientational correlation function to examine a relation between a rotation of an individual molecule and an energetic relaxation process. The hydrogen-bond correlation function of plastic ice decays in a way similar to liquid but it converges to a finite value as seen in ice VII, reflecting the rotational motion of the water molecule at the fixed location. In addition, the relaxation times of the two correlation functions for plastic ice resemble one another, confirming the fact that only the rotational motion invokes the hydrogen-bond rearrangements in plastic ice.

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