Abstract

Ionic conductivity, σ x , of single crystals of KBr x I 1− x solid solutions (0 ⩽ x ⩽ 1) has been measured at temperatures from 558 K to close to their melting points. There is a good correlation between the phase diagram and the variation in σ x . The composition x exhibiting the minimum in solidus temperature corresponds to the maximum in ionic conductivity. The increase in σ x as a function of x has been calculated in the intrinsic region and agrees well with the experimental results. The effect of homovalent substitution in mixed crystals of alkali halides is discussed.

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