The ionic conductivity of cadmium-doped silver chloride crystals

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Abstract
The conductivities of five single crystals of silver chloride have been measured from room temperature to close to their melting point: one crystal was pure and the others doped in the range 50-500 ppm with Cd2+. These conductivity data were first analysed using non-linear least squares techniques and the standard model. The resulting defect parameters and the defect concentrations and ionic mobilities with which they reproduce the experimental data are then compared with the same quantities derived in a second analysis which incorporates a recently determined temperature-dependent Frenkel defect formation energy. The value of the enthalpy of association of the cadmium-vacancy complexes is in reasonable agreement with recent estimates as are the values of the parameters governing migration by the vacancy and two interstitialcy mechanisms.

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