The diffusivities were determined at 0 to 80C. It was found that the results could be described by:

D (cm2/s) = 1.1 x 10-2 exp[-6.1(kcal/g-atom)/RT]

G.Holleck, E.Wicke: Zeitschrift für Physikalische Chemie, 1967, 56, 155-72