Vacancies, divacancies, and self‐diffusion in platinum

Thin wires of high‐purity platinum are quenched from high temperatures by means of the helium‐II technique. After quenching from about 1000 °C the electrical resistivity is found to recover between 380 and 520 °C with an activation energy of (1.33±0.05) eV. After quenching from near the melting point the recovery occures between 200 and 460°C and can be decomposed into two second‐order processes with activation energies of 1.0 and 1.34 eV, respectively. The self‐diffusion data are re‐analysed allowing for the contribution of both mono‐ and divacancies. This analysis is compared critically with the results of the present quenching experiments and with previous work. A consistent set of vacany parameters is proposed for Pt.