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