Structural phase transitions and Raman spectra of pyridinium perrhenate at high pressures
| Autor: | D. P. Kozlenko, Piotr Czarnecki, D.K. Pogoreliy, Leonid Dubrovinsky, Sergey E. Kichanov, K. M. Podurets, W. Nawrocik, J. Wasicki, B. N. Savenko |
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| Rok vydání: | 2009 |
| Předmět: |
Phase transition
Perrhenate Chemistry Organic Chemistry Crystal structure Analytical Chemistry Inorganic Chemistry chemistry.chemical_compound Crystallography symbols.namesake X-ray crystallography symbols Orthorhombic crystal system Pyridinium Raman spectroscopy Spectroscopy Monoclinic crystal system |
| Zdroj: | Journal of Molecular Structure. 921:68-71 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2008.12.034 |
| Popis: | The crystal structure and vibrational spectra of deuterated pyridinium perrhenate (d 5 PyH)ReO 4 (C 5 D 5 NHReO 4 ) have been studied by means of X-ray diffraction and Raman spectroscopy at high pressures up to 15 and 9.5 GPa, respectively. Two phase transitions, from orthorhombic phase II with Cmc2 1 symmetry to phase I with Cmcm symmetry at P = 0.7 GPa and to new monoclinic phase IV with P2 1 symmetry at P = 5 GPa were observed. The internal vibrational modes frequencies, lattice parameters and unit cell volume as functions of pressure were obtained for different phases. |
| Databáze: | OpenAIRE |
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