Crystal structure and phase transitions of a layered perovskite-like CsScF4 crystal

Описание

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.

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Издание

Журнал: CRYSTENGCOMM

Выпуск журнала: Vol. 18, Is. 43

Номера страниц: 8472-8486

ISSN журнала: 14668033

Место издания: CAMBRIDGE

Издатель: ROYAL SOC CHEMISTRY

Авторы

  • Krylov A.S. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Molokeev M.S. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia)
  • Misyul S.V. (Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia)
  • Krylova S.N. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Oreshonkov A.S. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia)
  • Ivanenko A.A. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Zykova V.A. (SB RAS, Inst Automat & Electrometry, Novosibirsk 630090, Russia)
  • Ivanov Y.N. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Sukhovsky A.A. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Voronov V.N. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Safonov I.N. (Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia)
  • Vtyurin A.N. (SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660041, Russia)

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