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A Study of Electrical Conductivity in Concentrated Solid Solutions ca 1− x Ln x F 2+ x (Ln = La, Gd, Er, Y)
Author(s) -
Švantner M.,
Mariani E.,
Fedorov P. P.,
Sobolev B. P.
Publication year - 1981
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19810160515
Subject(s) - electrical resistivity and conductivity , activation energy , arrhenius equation , conductivity , analytical chemistry (journal) , solid solution , materials science , fluorite , chemistry , thermodynamics , physics , metallurgy , chromatography , quantum mechanics
This work completes our previous results on the measurement of electrical conductivity in fluorite solid solutions Ca 1‐ x Ln x F 2+ x (M ARIANI et al.), Š VANTNER et al.) and gives new results for Ca 1‐ x Gd x F 2+ x and Ca 1‐ x Er x F 2+ x . The main characteristic of the measured ln σ vs 1/ T dependences in an increase of electrical conductivity and decreases of activation energy with increasing concentration of LnF 3 . The preexponential terms in the Arrhenius formula for electrical conductivity are constant for x > 0.01. In the interpretation of measured results the existence of regions with high concentration of defects is assumed in agreement with structural views.