The diffusive behavior of Cu was studied in single crystals at 623 to 973K. The results could be described by:

D (cm2/s) = 9.0 x 10-9 exp[-0.83(eV)/kT]

M.V.Demidenko: Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, 1975, 18[7], 153-5

The best linear fits to the solute diffusion data ([5] to [25]) yield:

Ag: Ln[Do] = 0.44E – 11.0 (R2 = 0.93); Au: Ln[Do] = 0.43E – 15.2 (R2 = 0.82);

Cd: Ln[Do] = 0.47E – 23.8 (R2 = 0.94); Cu: Ln[Do] = 0.37E – 14.9 (R2 = 0.29)