Local motifs in GeS2–Ga2S3 glasses

I. Pethes, V. Nazabal, R. Chahal, B. Bureau, I. Kaban, S. Belin, P. Jóvári

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The structure of (GeS2)0.75(Ga2S3)0.25 and (GeS2)0.83(Ga2S3)0.17 glasses was investigated by Raman scattering, high energy X-ray diffraction and extended X-ray absorption fine structure (EXAFS) measurements at the Ga and Ge K-edges. The reverse Monte Carlo simulation technique (RMC) was used to obtain structural models compatible with diffraction and EXAFS datasets. It was found that the coordination number of Ga is close to four. While Ge atoms have only S neighbors, Ga binds to S as well as to Ga atoms showing a violation of chemical ordering in GeS2–Ga2S3 glasses. Analysis of the corner- and edge-sharing between [GeS4/2] units revealed that about 30% of germanium atoms participate in the edge-shared tetrahedra.

Original languageEnglish
Pages (from-to)149-157
Number of pages9
JournalJournal of Alloys and Compounds
Volume673
DOIs
Publication statusPublished - Jul 15 2016

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Keywords

  • Corner- and edge-sharing polyhedra
  • EXAFS
  • Ge–Ga–S glasses
  • RMC
  • Structure
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Pethes, I., Nazabal, V., Chahal, R., Bureau, B., Kaban, I., Belin, S., & Jóvári, P. (2016). Local motifs in GeS2–Ga2S3 glasses. Journal of Alloys and Compounds, 673, 149-157. https://doi.org/10.1016/j.jallcom.2016.02.193