Diffusion coefficients of krypton--noble gas systems

The diffusion coefficients of krypton--noble gas binary mixtures were measured as a function of temperature from approximately 350 to 1200 K. A dual chamber apparatus with no moving parts was employed with an experimental procedure which is independent of the initial conditions. The new data agree well with previous workers except for Hogervorst's high temperature results for Ar--Kr, which lie progressively further below the present work at increasing temperatures. All existing data were normalized for composition dependence to equimolar and fitted to the correlating function recommended by Marrero and Mason. Several intermolecular potentials for each system were used to calculate theoretical diffusion coefficients. These were compared to the experimental correlations and deviations from the correlations are shown for the preferred potentials