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The crystal structure of YAl 3 (BO 3 ) 4 is obtained by Rietveld refinement analysis in the present study. The dynamical properties are studied both theoretically and experimentally. The experimental Raman and Infrared spectra are interpreted using the results of ab initio calculations within density functional theory. The phonon band gap in the Infrared spectrum is observed in both trigonal and hypothetical monoclinic structures of YAl 3 (BO 3 ) 4 . The electronic band structure is studied theoretically, and the value of the band gap is obtained. It was found that the YAl 3 (BO 3 ) 4 is an indirect band gap dielectric material.

Structural, Electronic and Vibrational Properties of YAl3(BO3)4