Glass formation and short-range order in chalcogenide materials: The (Ag2S)x(As2S3)1-x (0x1) pseudobinary tie line

I. T. Penfold, P. S. Salmon

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The isotopic substitution method in neutron diffraction is applied to two chalcogenide glasses on the (Ag2S)x(As2S3)1-x (0x1) tie line of the Ag-As-S system. It is shown that there is a reduction from 4 to 3 in the average number of S atoms covalently bonded to Ag as x is increased from 0.096 to 0.500, but that As remains threefold coordinated by S. The onset of ionic conductivity as x is increased and the occurrence of two homogeneous glass-forming regions is therefore associated with a change in the coordination environment of the metal atom.

Original languageEnglish
Pages (from-to)2164-2167
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 30 Apr 1990

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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