Тип публикации: статья из журнала
Год издания: 2016
Идентификатор DOI: 10.1039/c6ce01144f
Аннотация: This work is devoted to the complex research on temperature phase transitions in a CsScF4 crystal. The crystal structure was solved and refined at different temperatures by using the Rietveld method. Structural phase transitions were investigated by using the following spectroscopic methods, some of them for the first time: BrillouПоказать полностьюin spectroscopy, Raman spectroscopy, IR absorption spectroscopy and NMR. The symmetry analysis of the Brillouin zone center of all phases is presented. The vibrational spectra of the crystal in three phases have been calculated. The structural phase transition mechanism was determined. The transitions at T-1 = 475 K and T-2 = 317.5 K are of displacement type. The Raman soft modes have been associated with rotations of the ScF6 octahedral group.
Журнал: CRYSTENGCOMM
Выпуск журнала: Vol. 18, Is. 43
Номера страниц: 8472-8486
ISSN журнала: 14668033
Место издания: CAMBRIDGE
Издатель: ROYAL SOC CHEMISTRY