Diffusion coefficients are reported for three binary systems containing Ne20, Ne22 and their naturally occuring mixture, Ne20.18, which provide evidence for the assumption that the potential function of a given system is independent of the isotopic nature of each component.

Diffusion coefficients and thermal diffusion factors are reported as functions of temperature for methane-noble gas systems and for the system Ar-Kr. The data and cross-term second virial coefficients selscted from the literature are used to generate approximate HFD-C spherical potential...

Limiting binary diffusion coefficients, D012, for mixtures of He with Ar, O2, N2, CO2 and SF6 and of Ar with N2 and O2, determined by the two-bulb method, are reported for the temperature range 195–400 K. The apparatus, calibrated with absolute data obtained at 300 K with a Loschmidt cell,...

Diffusion coefficients, D12, and thermal diffusion factors, αT, are reported for the systems He-N2, Ne-N2, Ar-N2, Kr-N2 and Xe-N2; the D12 values were measured over the temperature range 275–323 K and the αT values at 300 K. The diffusion coefficients were combined with accurate second virial...

Thermal diffusion factors, αT, have been measured as a function of concentration at 300 K for seven binary noble gas systems containing helium or neon. The results, obtained with a two-bulb cell, are in agreement with those of Savirón et al. who used a thermal diffusion column, and in general...

Thermal diffusion factors, αT, are reported for systems He-Ar, He-CO2 and He-SF6 at 300 K as functions of concentration and pressure. The measured values at finite pressures are compared with those predicted by the theory of Oost et al., and extrapolated zero pressure values with those...

Using accurate binary diffusion coefficients obtained over a temperature range of 275 to 323 K, together with some excellent second virial coefficients in the literature, (m, 6, 8) potential parameters have been obtained for the systems He-Ne, He-Ar, He-Kr, He-Xe, Ne-Ar, Ne-Kr, Ne-Xe, Ar-Kr and...

Diffusion coefficients and thermal diffusion factors are reported for binary mixtures of sulphur hexafluoride with noble gases. The results are compared with theoretical values calculated by means of the Chapman-Enskog theory, spherical potentials for the like interactions and multi-parameter...

Using a Loschmidt cell and a new cell for counting isotropic decay in the gas phase, the tracer diffusion coefficient of Kr85 in argon has been measured at 300 K. The results are compared with two similar sets of data obtained in this laboratory, the first using a mass spectrometer with a...