Self‐Diffusion in Liquid Gallium

Self‐diffusion in liquid gallium metal at atmospheric pressure is described by the equation: D = 1.07 × 10—4 exp[—1122/RT] cm2 sec—1. At 30°C the effect of pressure on the rate of self‐diffusion is given by: log10D = —4.7793—9.529×10—6P (kg cm—2). The activation volume at this temperature is 0.55 cm3 g atom—1. Although the Stokes‐Einstein radius agrees quite well with the ionic radius of Ga+3, the temperature coefficients of viscosity and diffusivity differ somewhat.