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This article is cited in 6 scientific papers (total in 6 papers)
Dielectrics
Correlation between the fluorine ion conductivities of Sr$_{1-x}$R$_{x}$F$_{2+x}$ (CaF$_2$ type) and $R_{1-y}$Sr$_{y}$F$_{3-y}$ (LaF$_3$ type) crystals in the SrF$_{2}$–RF$_{3}$ systems ($R$ = La–Nd)
N. I. Sorokin, B. P. Sobolev Federal Research Center Crystallography and Photonics, Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, Russia
Abstract:
The “conductivity logarithm–composition” correlation $\log\sigma_{\operatorname{dc}}(x)=ax+b$ has been revealed for the strongly nonstoichiometric fluorite Sr$_{1-x}$R$_{x}$F$_{2+x}$ ($x$ is the $R$F$_{3}$ molar fraction, 0.15 $\le x\le$ 0.47) and tysonite $R_{1-y}$Sr$_{y}$F$_{3-y}$ ($y$ is the SrF$_{2}$ molar fraction, $y=1-x$, 0.85 $\le x\le$ 0.97) phases in the SrF$_{2}$–$R$F$_{3}$ systems ($R$ = La, Ce, Pr, Nd). The conductivity $\sigma_{\operatorname{dc}}$ of the eutectic 70LaF$_{3}$ + 30SrF$_{2}$ (mol %) composite fits well with the dependence $\log\sigma_{\operatorname{dc}}(x)$ for the nonstoichiometric Sr$_{1-x}$La$_{x}$F$_{2+x}$ and La$_{1-y}$Sr$_{y}$F$_{3-y}$ phases.
Keywords:
fluorides, single crystals, rare-earth elements, ionic conductivity, superionic conductors.
Received: 05.06.2019 Revised: 05.06.2019 Accepted: 17.06.2019
Citation:
N. I. Sorokin, B. P. Sobolev, “Correlation between the fluorine ion conductivities of Sr$_{1-x}$R$_{x}$F$_{2+x}$ (CaF$_2$ type) and $R_{1-y}$Sr$_{y}$F$_{3-y}$ (LaF$_3$ type) crystals in the SrF$_{2}$–RF$_{3}$ systems ($R$ = La–Nd)”, Fizika Tverdogo Tela, 61:11 (2019), 2064–2069; Phys. Solid State, 61:11 (2019), 2034–2040
Linking options:
https://www.mathnet.ru/eng/ftt8617 https://www.mathnet.ru/eng/ftt/v61/i11/p2064
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