Self-diffusion in Kr compared with Van der Waals model
The predictions of the Van der Waals model for the self-diffusion in Kr are compared with the experimental results at 220 K and for 0.7ρc ⪕ ρ ⪕ 2.1ρc. The Van der Waals model fails to represent the Kr data while at the same temperature in the case of CH4 this model works quite well for ρc < ρ ⪕ 3ρc.