Abstract
60B2O3-32CaF2-8Bi2O3 glasses codoped with chromium and neodymium have been prepared for the first time, and their luminescence properties have been studied. The glasses have been shown to contain chromium in two oxidation states. We have obtained luminescence spectra of Cr3+ in octahedral coordination and Cr4+ in tetrahedral coordination. Energy transfer from Bi3+ to Nd3+ and Cr3+ has been demonstrated.
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