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

Chris J. Benmore; Philip S. Salmon

doi:10.1016/0022-3093(93)90054-2

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

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Abstract

The coordination environment of Ag in bulk-quenched Ag₄As_37.6Se_58.3 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 language	English
Pages (from-to)	720-724
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	156-158
Issue number	PART 2
DOIs	https://doi.org/10.1016/0022-3093(93)90054-2
Publication status	Published - 2 May 1993

ASJC Scopus subject areas

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

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title = "Structure of fast-ion conducting chalcogenide glasses: the AgAsSe system",

abstract = "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.",

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AU - Benmore, Chris J.

AU - Salmon, Philip S.

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N2 - 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.

AB - 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.

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

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