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Study of vibrational spectra and thermal behavior of crystallohydrates Cs5Zr4F21· 3H2O and Rb5Zr4F21· 3H2O
Russian version
Didenko N. A. 1, Voit E. I. 1
1Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia
Email: ndidenko@ich.dvo.ru, evoit@ich.dvo.ru
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The structure and thermal behavior of isostructural cesium and rubidium crystallohydrates of the composition Cs5Zr4F21· 3H2O and Rb5Zr4F21· 3H2O were studied by vibrational spectroscopy (IR and Raman), DTA-TGA and X-ray diffraction (XRD). Experimental IR and Raman spectra of the Cs5Zr4F21· 3H2O, Rb5Zr4F21· 3H2O crystal hydrates and its products thermal dehydration were performed, systematized and analyzed. Based on the results of quantum-chemical calculations, bands in the experimental spectra were assigned. The structural features of the compounds under discussion were considered and differences in the organization of the crystal structures were revealed. Keywords: complex zirconium fluorides, crystallohydrates of rubidium and cesium fluoridozirconates, vibrational spectroscopy.
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