Superionic Character of High-Temperature Conduction in Lanthanum Fluoride View Full Text


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Article Info

DATE

2004-01

AUTHORS

B. M. Voronin, S. V. Volkov

ABSTRACT

The electroconduction of crystalline lanthanum fluoride is studied in the temperature range from 1320 K to the melting point (1766 K). A markedly pronounced superionic behavior of LaF3 is established: near mp its conductivity amounts to 42% of that corresponding to a molten state. Thermodynamics of the formation of defects and their concentrations are estimated on the basis of available data on the high-temperature enthalpy of LaF3 within a model of noninteracting defects. The Schottky and Frenkel mechanisms of ion disordering are considered. A comparative analysis of these two mechanisms supplemented with results on the conductivity favors the Frenkel mechanism of the origin of defects in LaF3. More... »

PAGES

44-49

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/b:ruel.0000012073.09658.4f

DOI

http://dx.doi.org/10.1023/b:ruel.0000012073.09658.4f

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1052015480


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