It was found that Cu diffusivity data could be described by:

118-140C:     D (cm2/s) = 2.77 x 106 exp[-1.33(eV)/kT]

182-242C:     D (cm2/s) = 1.88 x 10-2 exp[-0.48(eV)/kT]

N.V.Baranova, A.S.Tomson, N.P.Artamonov, A.V.Vanyukov: Izvestiya Akademii Nauk SSSR – Neorganicheskie Materialy, 1976, 12[12], 2142-5