EPR AND OPTICAL-ABSORPTION OF MN2-NA2SO4-ZNSO4 GLASSES( IONS IN TERNARY K2SO4)

Electron paramagnetic resonance (e.p.r.) and optical absorption measur ements were performed on K2SO4- Na2SO4-ZnSO4 glasses containing 1-10 m ol% of MnSO4 . H2O. The spectra of Mn2+-doped samples exhibit a sextet centred at g = 2.03. The e.p.r. signal clearly shows its dependence o n the dopant ion concentration. The optical absorption spectrum at roo m temperature shows bands characteristic of Mn2+ ions in octahedral sy mmetry. The crystal field (Dq) and the Racah interelectronic repulsion (B and C) parameters have been evaluated. E.p.r. and optical absorpti on studies reveal that the Mn2+ ions go substitutionally to Zn ion sit es and the site symmetry around the transition metal ion is octahedral .