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Raman and FTIR spectral investigations of twinned M[ crystals
Raman and infrared spectra of twinned M[(I[O.sub.3]).sub.2] (M = Mn, Ni, Co, and Zn) crystals are recorded and the observed bands are assigned in terms of vibrations of the I[O.sub.6] octahedron. The I[O.sub.6] octahedra in Mn[(I[O.sub.3]).sub.2] and Zn[(I[O.sub.3]).sub.2] are comparatively more dis...
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Published in: | Journal of applied spectroscopy 2016-01, p.941 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | Raman and infrared spectra of twinned M[(I[O.sub.3]).sub.2] (M = Mn, Ni, Co, and Zn) crystals are recorded and the observed bands are assigned in terms of vibrations of the I[O.sub.6] octahedron. The I[O.sub.6] octahedra in Mn[(I[O.sub.3]).sub.2] and Zn[(I[O.sub.3]).sub.2] are comparatively more distorted than those of Co[(I[O.sub.3]).sub.2] and β-Ni[(I[O.sub.3]).sub.2]. The [Iv.sub.1]/[Iv.sub.5] ratio of Mn[(I[O.sub.3]).sub.2] is higher compared to other compounds, and its linear polarizability is more than that of angular polarizability. The noncentrosymmetric space group of the title compounds is confirmed by the coincidence of the majority of IR and Raman bands, and the compounds giving intense Raman bands are expected to give better SHG efficiency. |
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ISSN: | 0021-9037 1573-8647 |
DOI: | 10.1007/s10812-016-0209-1 |