The Self-Diffusion of Liquid Mercury

Self-diffusion coefficients in liquid mercury have been measured by the capillary technique and have been found to be in disagreement with the earlier calculated values of Haissinsky and Cottin. In view of the fact that the present data have been obtained by direct measurement and are also much more compatible with known viscosity data, it is concluded that the data of Haissinsky and Cottin are invalid. An examination of liquid self-diffusion data in general has shown that the Stokes-Einstein equation usually gives a much better correlation of self-diffusion and viscosity coefficients than the Eyring equation.