Structure of covalently bonded glass-forming melts: A full partial-structure-factor analysis of liquid GeSe2

Ian T. Penfold, Philip S. Salmon

Research output: Contribution to journalArticle

Abstract

The first full partial-structure-factor analysis of molten GeSe2 is made using the method of isotopic substitution in neutron diffraction. It is shown that the melt comprises roughly equal numbers of edge- and corner-sharing tetrahedra which give rise to a highly connected or network liquid. Concentration fluctuations extend over distances characteristic of the intermediate-range order, contrary to the results obtained from recently developed effective potentials for covalently bonded glass-forming melts. The problem as to whether or not GeSe2 forms a chemically ordered continuous random network is examined.

Original languageEnglish
Pages (from-to)97-100
Number of pages4
JournalPhysical Review Letters
Volume67
Issue number1
DOIs
Publication statusPublished - 1 Jul 1991

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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