부산대학교 도서관

The local environment of arsenic atoms in vitreous samples of the system Sb2S3–As2S3–Tl2S has been studied by EXAFS at the AsK-edge. The crystalline compound Tl5.6As15S25.3 situated within the zone of glass formation of the Sb2S3–As2S3–Tl2S phase diagram was used as reference compound in order to derive appropriate phase and amplitude functions. The structure parameters determined were the number of first neighbours NAs–S, the arsenic-sulphur distance, RAs–S, and the Debye-Waller factor, σAs–S. The influence of the glass-forming antimony sulphide Sb2S3 and the glass-modifying thallium sulphide Tl2S on the As2S3 host matrix has been shown.