X-ray diffraction studies on Agi-Ag<inf>2</inf>O-V<inf>2</inf>O<inf>5</inf> glasses

Results of X-ray diffraction studies on glasses in the AgI-Ag2O-V2O5 system are presented. In these glasses, the vanadium atom adopted five-fold coordination of oxygen atoms more frequently than four-fold and six-fold and the V-O distances lay between 1.76 and 1.79 Å. The VOx polyhedra in the glasses shared corners, the V-V distances in the glasses lay between 3.30-3.41 Å. Short and long Ag-O interactions were observed. An Ag-I interaction between 2.829-2.876 Å was observed, which is characteristic of all AgI based glasses. The I-I distance decreased as the iodine content increased, having a value close to that in α-AgI at a high AgI content and approaching the value of β-AgI with decreasing AgI content.