Molecular dynamics studies of self-interstitials in ice lh

Hidenosuke Itoh, Katsuyuki Kawamura, Takeo Hondoh, Shinji Mae

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We carried out molecular dynamics simulations of interstitial water molecules in ice to clarify behavior and vibrational properties of self-interstitials in ice. We used an atom-atom potential model developed by Kumagai et al. [N. Kumagai, K. Kawamura and T. Yokokawa, Mol. Sim. 12, 177 (1994)] which allows intramolecular motions. We confirmed high reliability of the potential model for reproducing the structure and vibrational spectra of ice. From trajectory observations of self-interstitials, we found that a stable interstitial site is an uncapped trigonal site. By comparing power spectra of vibrational motions for self-interstitials with that of matrix ice, we found that the large formation entropy of the interstitial molecule is attributed to much higher density of states in a low frequency region for the interstitial than that for the matrix.

Original languageEnglish
Pages (from-to)2408-2413
Number of pages6
JournalJournal of Chemical Physics
Volume105
Issue number6
DOIs
Publication statusPublished - Aug 8 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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