This objective of research for study effect of add manganese (MnO2) in to the composition that developed are composition (60-x)B2O3: 20ZnO: 20BaO: xMnO2 mol%. The results found that the density of glasses doped with MnO2 not found relationship between density and intensity quantity of MnO2 ranged from 2.8625 ± 0.0021 to 2.9165 ± 0.0019 g/cm3