Characterization of Mnless thansupgreater than2+less than/supgreater than ion Doped KCdBSi (Kless thansubgreater than2less than/subgreater thanO - CdO - Bless thansubgreater than2less than/subgreater thanOless thansubgreater than3less than/subgreater than

K2O - CdO - B2O3 SiO2glasses containing different concentrations of MnO2 have been prepared. The Physical properties of the glasses are studied from their density. The studies have been analysed in the light of different oxidation states of manganese ion with the aid of the data from optical absorption. The analysis shows that manganese ions exist mainly in Mn2+ state, occupy tetrahedral positions and increase the insulating strength of the glass if MnO2 is present in smaller concentrations.