NEW FAMILY OF VITREOUS MATERIALS: THE CESIUM ALUMINUM OR GALLIUM THIOHALIDE GLASSES.

Article abstract of DOI:10.1016/0025-5408(87)90217-0

A new class of nontoxide glasses with the general composition CsAXY//2 (A equals Al, Ga; X equals S, Se; Y equals Cl, Br) has been isolated and characterized. Raman spectroscopy, investigations of the infrared multiphonon edge, and differential thermal analysis measurements show that these glasses contain a giant polymeric tetrahedra-based anion and have good resistance to devitrification. Their chemical durability in a normal atmosphere is very poor and severely affects their optical properties, especially in the infrared multiphonon region.