Measurements of the electrochemical potential distribution on polycrystalline Cu2-αS have been made. It was found that the basic transport mechanism for ionic conduction at temperatures between 25–70 °C for single phase chalcocite can be modeled as a vacancy mechanism. The chemical diffusion coefficient of copper in coper sulfide depends on the stoichiometry of the material and exhibit Arrhenius-type activated temperature dependence with the activation energy Ea=0.45 eV.
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Allen et al. (1984) studied this question.
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