The diffusion of 64Cu in γ-phase material was studied at temperatures of between 170 and 340C. It was found (table 14) that the tracer diffusion coefficient was larger, by a factor of 5 at 170C and by a factor of 2 at 340C, than the diffusivity which was calculated from the ionic conductivity. The Arrhenius plots of both quantities were curved, but the difference between them was linear and corresponded to the diffusion coefficient which was deduced from nuclear magnetic resonance data. On the basis of the differences between these 3 diffusion coefficients, it was concluded that Cu+ atomic transport took place largely via associated pairs of interstitial Cu+ ions and cation vacancies. Tracerdiffusion von 64Cu in γ-Kupferbromid im Vergleich mit Ergebnissen aus Leitfähigkeits- und Kernresonanzmessungen. H.P.Schäfgen, H.Richtering: Berichte der Bunsengesellschaft für Physikalische Chemie, 1984, 88[4], 401-5