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The electrical properties of polycrystalline copper(I) bromide were investigated between 20 and 430°C by impedance spectroscopy with copper electrodes. Extrinsic and intrinsic regions in γ-CuBr and a domain of fast ionic conduction in β-CuBr are separated. Enthalpies of migration of copper interstitials (25 kJ/mol) and copper vacancies (50 kJ/mol) and the enthalpy of formation of Frenkel defects...
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