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Crystal structure and lattice dynamics of Sr3Y(BO3)3 |
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| Authors: | M. M?czka A. Wa?kowska J. Kisielewski J. Hanuza |
| Affiliation: | a Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroc?aw 2, Poland b Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Street, 00-908 Warszawa, Poland c Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland d Department of Bioorganic Chemistry, Faculty of Industry and Economics, University of Economics, ul. Komandorska 118/120, 53-345 Wroc?aw, Poland |
| Abstract: | X-ray, Raman and infrared (IR) studies of the Sr3Y(BO3)3 (BOYS) single crystal grown by the Czochralski technique are presented. The crystal structure is trigonal, space group  (no. 148), and comprises six formula units in the unit cell with the hexagonal axes a=12.527(2) and c=9.280(2) Å. The assignment of the observed vibrational modes is proposed on the basis of lattice dynamics calculations. The unusual large bandwidth of the internal modes and the enhancement of the principal mean square thermal displacements for BO3 and Y(1) indicate that some type of disorder is present in the studied crystal. |
| Keywords: | Crystal structure Phonon properties Laser material Borate |
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