The coalescence of Au grains (5 x 10-5cm diameter) on the (100) surfaces of single crystals was studied by means of electron microscopic analysis. On the basis of the results, it was calculated that the surface diffusivity of Au, at 370 to 450C, could be described by:

D (cm2/s) = 5 x 104 exp[-52.0(kcal/mol)/RT]

Y.E.Geguzin: Fizika Tverdogo Tela, 1970, 12[7], 1953-62