Structural study of 0.4Sb2Se3-0.6CuI (Chalcohalide) glass using Neutron Diffraction

The chalcogenide-halide glasses are a new class of glasses which have infrared transmission properties superior to the simple chalcogenide glasses, which make them candidates for CO2 laser fibers and infrared windows. Neutron diffraction studies on the sample 0.4Sb2Se3-0.6CuI have been done to understand the short range order. Neutron data shows presence of Inermediate range order = 7 A with a coherence length of 22 A. The short range order mainly consists of Sb-(Se,I) pyramids which are connected to Cu-(Se,I) bonds with co-ordinations of 3 and 4. Cu seems to be actively participating in the network formation.