NDLI: Ionic mobility and phase transitions in heptafluorodiantimonates MSb$_{2}$F$_{7}$ and Cs$_{(1−x)}$M$_{ x }$′Sb$_{2}$F$_{7}$ (M′ = K, NH$

Content Provider	Springer Nature Link
Author	Kavun, V. Ya. Slobodyuk, A. B. Polyantsev, M. M. Zemnukhova, L. A.
Copyright Year	2013
Abstract	Ionic mobility and phase transitions in heptafluorodiantimonates with homo- and heteroatomic cations in the systems MSb$_{2}$F$_{7}$ (M = K, Cs, NH$_{4}$) and CsM’Sb$_{2}$F$_{7}$ (M’ = K, NH$_{4}$) have been studied using the $^{19}$F, $^{1}$H NMR and DSC methods. Analysis of the $^{19}$F and $^{1}$H NMR spectra made it possible to reveal the nature of ion motions in the fluoride and proton sublattices upon temperature variation and to determine the types and temperature ranges of such motions. It was found that diffusion of fluorine ions becomes the dominant form of ion motions in the high-temperature modifications, the amount of diffusing ammonium ions depending on the composition of a sample. The observed phase transitions in cesium-potassium and cesium-ammonium fluoroantimonates(III) leading to the formation of high-temperature modifications are the transitions to superionic state. According to preliminary results of electrophysical studies, hightemperature phases Cs$_{1−x }$(NH$_{4}$)$_{ x }$Sb$_{2}$F$_{7}$ (0.05 ≤ x ≤ 0.6) are superionic, their conductivity reaching −10$^{−3}$-10$^{−4}$ S/cm at 463–483 K.
Starting Page	137
Ending Page	145
Page Count	9
File Format	PDF
ISSN	00224766
Journal	Journal of Structural Chemistry
Volume Number	54
Issue Number	1
e-ISSN	15738779
Language	English
Publisher	Springer US
Publisher Date	2013-10-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cesium-potassium and cesium-ammonium heptafluorodiantimonates(III) ionic mobility phase transitions NMR spectra Inorganic Chemistry Physical Chemistry Atomic, Molecular, Optical and Plasma Physics Atomic/Molecular Structure and Spectra Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Physical and Theoretical Chemistry Inorganic Chemistry

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