Impedance measurements and chronopotentiometry methods were used to investigate the diffusion of Pb2+ in the melt. The impedance technique yielded a diffusivity of 4.60 x 10-5 cm2/s at 800C and an activation energy of 11.1kcal/mol. The chronopotentiometric technique yielded corresponding figures of 4.40 x 10-5cm2/s and 9.2kcal/mol. Diffusion Kinetics of the Electrolytic Extraction of Pb, Bi, Zn and Cd from Fused Chlorides. R.Y.Bek, A.S.Lifshits: Izv. Sib. Otd. Akad. Nauk SSSR - Khim. Nauk, 1970, 3, 58-63