SULFUR K-EDGE XAS STUDY OF AS2S3-SB2S3-TL2S GLASSES

The local environment of sulfur in amorphous As2S3-Sb2S3-Tl2S was stud ied by XAS at the sulfur K-edge. Variations in shape and position of t he white line are attributed to changes in the nature of the chemical bond, the metal-sulfur bond lengths, and the homogeneity of the metal- sulfur bond length distributions. The variations of the white line par ameters, position and line width, with sample composition reveal the d ifferent influences of the glass-forming arsenic sulfide and antimony sulfide and the glass modifying thallium sulfide.