The structural role of tungsten ions in PbO–Sb2O3–As2O3 glass-system by means of spectroscopic investigations

PbO–Sb2O3–As2O3 glass containing different concentrations of WO3 ranging from 0 to 2 mol% were prepared. A number of studies, viz. differential thermal analysis (DTA), magnetic susceptibility, infrared spectra, optical absorption and ESR spectra have been carried out. The results of DTA indicated the highest glass forming ability for the glass containing 0.6 mol% of WO3. The results of spectroscopic and magnetic studies have been analyzed in the light of different oxidation states of tungsten ions.