Abstract
Phosphate glasses containing CuO with composition [(CuO)x(P2O5)1-x], with x = 0.10, 0.20, 0.25, 0.30, 0.40 or 0.50, have been studied. It was observed that compositional changes took place in going from batch to glass and these changes were more pronounced for low copper concentrations. The magnetization measurements suggest that more than 90 percent of the copper ions exist in the Cu2+ state in the glasses, while the XPS data show that less than 50 percent of the copper ions may be in the Cu2+ state.