Structural, Electronic and Vibrational Properties of YAl 3 (BO 3 ) 4 .
MATERIALS(2020)
Abstract
The crystal structure of YAl3(BO3)(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 YAl3(BO3)(4). The electronic band structure is studied theoretically, and the value of the band gap is obtained. It was found that the YAl3(BO3)(4) is an indirect band gap dielectric material.
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Key words
YAl3(BO3)(4),huntite-like structure,rare-earth alumoborates,infrared spectra,monoclinic domains
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