Transition of ZnZrF6·4H2O to ZnZrF6·5H2O and patterns of structural transformations. N.A. DIDENKO, E.I. VOIT, K.A. SAYANKINA

Authors

  • Нина Алексеевна ДИДЕНКО
  • Елена Ивановна ВОЙТ
  • Ксения Анатольевна САЯНКИНА (Институт химии ДВО РАН, Владивосток)

Keywords:

complex fluoride, fluoridozirconate, crystal structure, crystalline hydrate, vibrational spectra

Abstract

Transition of ZnZrF6·4H2O to ZnZrF6·5H2O and patterns of structural transformations. N.A. DIDENKO, E.I. VOIT, K.A. SAYANKINA (Institute of Chemistry, FEB RAS, Vladivostok).

Interaction of crystalline hydrate of ZnZrF6∙4H2O with water vapors from the air was studied by methods of Raman spectroscopy and XRD. It is shown that the compound ZnZrF6∙4H2O at 22–23 °C is unstable in the atmosphere of moist air (ρH2O = 0.73–0.84 kPa). It has been found that under these conditions the transition of ZnZrF6∙4H2O → ZnZrF6∙5H2O takes place in two stages. At first, the starting compound adsorbs water and forms the hydrate ZnZrF6∙6H2O. And then the hexahydrate dehydrates rather quickly to ZnZrF6∙5H2O, due to the presence of structural distortions and defects in the crystal lattice of the high-water compound. A possible mechanism of structural transformations during ZnZrF6∙4H2O → ZnZrF6∙6H2O → ZnZrF6∙5H2O transitions is proposed. 

Author Biographies

Нина Алексеевна ДИДЕНКО

научный сотрудник,

Елена Ивановна ВОЙТ

кандидат химических наук, старший научный сотрудник,

Ксения Анатольевна САЯНКИНА, (Институт химии ДВО РАН, Владивосток)

младший научный сотрудник

Published

2020-12-16

How to Cite

ДИДЕНКО, Н. А., ВОЙТ, Е. И., & САЯНКИНА, К. А. (2020). Transition of ZnZrF6·4H2O to ZnZrF6·5H2O and patterns of structural transformations. N.A. DIDENKO, E.I. VOIT, K.A. SAYANKINA. Vestnik of the Far East Branch of the Russian Academy of Sciences, (6), 61–69. Retrieved from http://vestnikdvo.ru/index.php/vestnikdvo/article/view/675

Issue

Section

Non-conventional materials