The a.c. electrical conductivity of annealed single crystals of pure NaCl and of crystals strained up to 5 % is anomalously large in the range within 4 K of the melting point. The enthalpy of activation increases to approximately 180 eV. A similar phenomenon occurs in pure and in SrCl2-doped KCl. The possible relation of the phenomenon to the mechanism of melting is briefly discussed.
A. R. Allnatt and S. J. Sime, Trans. Faraday Soc., 1971, 67, 674 DOI: 10.1039/TF9716700674
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