Laser Raman Spectroscopy of Crystals with the Structure of Sillenite |
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| Authors: | V. I. Burkov V. S. Gorelik A. V. Egorysheva Yu. F. Kargin |
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| Affiliation: | (1) Department of Chemistry, Otto Maass Building, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6;(2) Facult? des Sciences et Techniques F?s Saiss, Fes, Morocco;(3) Spectroscopy Laboratory, Department of Chemistry, Ibn Tofail University, Kenitra, Morocco;(4) College of Engineering, Department of Chemical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, Canada, S7N 5A9; |
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| Abstract: | The experimental data of the past 10–15 years for the vibrational spectra of crystals with the structure of sillenite Bi12MxO20± obtained by the methods of laser Raman scattering and infrared (IR) absorption are generalized. Correlations between the chemical composition and crystal structure of the compounds (variations of the cation M) and their vibrational spectra are established. It is shown that the main contribution to formation of the high frequency part of the spectrum of two, three, and fourphonon absorption is given by phonons related to vibrations of the [MO4]n- complexes. On the basis of the analysis of Raman spectra, the effective use of crystals with the structure of sillenite in acoustooptics is justified. |
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