Resistivity calculations for liquid Na-Cs and K-Cs alloy systems

The resistivities of liquid Na-Cs alloys are calculated as a function of the composition. A version of the Heine-Abarenkov model potential is used with special attention to three corrections: first, concentration-dependent core shifts are introduced, secondly, effective masses are taken into account and thirdly, many-electron effects are included by taking the Toigo and Woodruff dielectric function. For the partial structure factors of the alloys the solutions of the Percus-Yevick equations for a binary mixture of hard spheres are applied. The discrepancy between theoretical and experimental values is of the order of twenty percent.