Abstract
Empirical parameters of interionic interactions in α-Al2O3 crystals were determined in terms of the shell model. The lattice dynamics of α-Al2O3 crystals with vacancies in different charge states was simulated using these parameters and the recursive method. Frequencies of defect-induced resonance vibrations in different directions were determined. Main features specific to vibration spectra of anion-nonstoichiometric α-Al2O3 crystals, which were due basically to changes in the effective force of interaction between vacancies and the nearest environment, were analyzed and explained.
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