Abstract
Results are reported for electron paramagnetic resonance (EPR) and optical absorption structural investigations of Mn 2+ ions in alkali barium borophosphate glasses at room temperature. The Mn 2+ EPR hyperfine sextet centered at g = 2 was observed in all the glasses for 1 mol% Mn 2O 3. The absorption spectra of Mn 2+ ions in these glasses showed broad absorption bands characteristic of Mn 2+ ions in octahedral symmetry. From the EPR and optical results, it is concluded that the site symmetry around Mn 2+ ions is octahedral, and the nature of the bonding character is dominantly ionic.
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