Self-diffusion in single crystals was measured at 822 to 1163K by using the 71Ge radiotracer, and serial sectioning methods. The results could be described by:

D (m2/s) = 2.48 x 10-3 exp[-3.14(eV)/kT]

G.Vogel, G.Hettich, H.Mehrer: Journal of Physics C, 1983, 16[30], 6197-204