Fragmentary Model of the Atomic Structure of the Ion-Conducting Semiconductor Glass AgGeAsSe3

The atomic radial distribution function of vitreous AgGeAsSe 3 , obtained based on the experimental intensity curves taken with monochromatic copper and molybdenum radiation, is interpreted using a fragmentary model in the entire ordering region (~9 Å). It is shown that the glass consists of seleniu...

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Bibliographic Details
Published in:Glass physics and chemistry 2023-10, Vol.49 (5), p.421-430
Main Authors: Aleinikova, K. B., Zinchenko, E. N., Melnikova, N. V.
Format: Article
Language:English
Subjects:
Atomic structure
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Distribution functions
Fragments
Germanium
Glass
Ion currents
Materials Science
Natural Materials
Physical Chemistry
Radial distribution
Selenium
Silver
Tetrahedra
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Summary:The atomic radial distribution function of vitreous AgGeAsSe 3 , obtained based on the experimental intensity curves taken with monochromatic copper and molybdenum radiation, is interpreted using a fragmentary model in the entire ordering region (~9 Å). It is shown that the glass consists of selenium and selenium-arsenic tetrahedra with germanium and silver atoms inside. The spatial arrangement of such tetrahedra in glass within the ordering region is similar to their arrangement in the GeAsSe and GeSe 2 structures. It is proposed that the “openwork” structure of the fragments of these structures allows the movement of Ag + ions (ionic conductivity) in vitreous AgGeAsSe 3 . Fragments of the structure of the ion-conducting compound Ag 2 Se are not found in the studied glass.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659623600497