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Self-diffusion and interdiffusion coefficients of binary ionic mixtures areevaluated using the Effective Potential Theory (EPT), and the predictions arecompared with the results of molecular dynamics simulations. We find that EPTagrees with molecular dynamics from weak coupling well into the strong couplingregime, which is a similar range of coupling strengths as previously observedin comparisons with the one-component plasma. Within this range, typicalrelative errors of approximately 20% and worst-case relative errors ofapproximately 40% are observed. We also examine the Darken model, whichapproximates the interdiffusion coefficients based on the self-diffusioncoefficients.

Effective Potential Theory for Diffusion in Binary Ionic Mixtures