Calculation of self-diffusion coefficients in liquid metals based on hard sphere diameters estimated from viscosity data

Temperature-dependent hard sphere diameters are determined from viscosity d ata for sixteen liquid metals. These diameters are then used to calculate d iffusion coefficients using the hard sphere model as well as the Stokes-Ein stein model. Both models predict a temperature dependence of the diffusivit y that is weaker than that observed experimentally. However, the prediction s are comparable to those obtained using the Protopapas-Parlee hard sphere diameters which were determined from the diffusivity data. (C) 2001 Elsevie r Science B.V. All rights reserved.