Synthesis, Structure and Electrophysical Properties of Fluoride-Conducting Phases Вa1-XLaXSnF4+X
Affiliation:
1 V.I. Vernadsky Institute of General and Inorganic Chemistry, NAS of Ukraine, 32-34, Acad. Palladina Ave., 03680 Kyiv, Ukraine
2 Sumy State University 2, Rymskogo-Korsakova St., 40007 Sumy, Ukraine
3 Institute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum, 9, 04013, Košice, Slovakia
lysenkooleh34@gmail.com
DOI:
https://doi.org/10.23939/chcht18.03.313
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Keywords:
Abstract:
It has been determined that the concentration interval for the existence of solid solutions of heterovalent substitution Ba1-xLaxSnF4+x, which are formed by the partial replacement of barium cations with lanthanum cations in the BaSnF4 compound, is 0.0<х≤0.12. The obtained phases are isostructural BaSnF4, have a crystal lattice of tetragonal syngony, corresponding to the P4/nmm space group. The change in the values of electrical conductivity and its activation energy is extreme, with a maximum for the composition with lanthanum cation content of 0.07 m.р. and is 3.08∙10–3 S/cm at 623 K and 5.69∙10–4 S/cm at 293 K, respectively. The electrochemical stability window of the synthesized phases is estimated by the potential range of –1.7 ÷ +1.7V.
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