Tracer diffusion techniques

Abstract

We review tracer diffusion techniques with emphasis on results that have introduced lattice defects. We describe particularly a number of experimental confirmations of some of Lidiard's theories which had strongly contributed to the development of defect physics: vacancy solubility product from self-diffusion in ionic crystals, correlation effects in self and heterodiffusion, association of defects in pairs and complexes, heterodiffusion coefficient in the five-frequency model, solvent diffusion enhancement, etc.