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Theoretical analysis of optical properties of two recently synthesized phosphors with the Ce3+ ions (Na3LuSi2O7 and NaSr4(BO3)3) was performed. The exchange charge model of crystal field was used to calculate the crystal field parameters and cerium 5d states splittings for each site in Na3LuSi2O7. Analysis of vibronic coupling of Ce3+ in NaSr4(BO3)3 resulted in a quantitative modeling and theoretical...
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