Structure of fast-ion conducting chalcogenide glasses: the AgAsSe system

Chris J. Benmore, Philip S. Salmon

Research output: Contribution to journalArticlepeer-review


The coordination environment of Ag in bulk-quenched Ag4As37.6Se58.3 and Ag2As3Se4 glasses is investigated by using the method of isotopic substitution in neutron diffraction. It is found that there is little change in the short-range order about Ag between the two compositions: Ag is covalently bonded to an average of ≈ 3 Se atoms at a distance of ≈ 2.68 A ̊ in both samples. The absence of a pronounced change in the structure about the metal atom in the AgAsSe system, between glass compositions where the electrical conductivity is electronic (4 at.% Ag)_and where it is predominantly ionic (22.2 at.% Ag), is by direct contrast with the case observed for glasses in the AgAsS system.

Original languageEnglish
Pages (from-to)720-724
Number of pages5
JournalJournal of Non-Crystalline Solids
Issue numberPART 2
Publication statusPublished - 2 May 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry


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