Diffusion in In-doped and In-free n-type single crystals was studied at 750 to 850C. The results could be described by:

In-doped:     D (cm2/s) = 5.0 x 10-1 exp[-53.1(kcal/g-atom)/RT]

In-free:     D (cm2/s) = 3.2 x 100 exp[-56.0(kcal/g-atom)/RT]

V.A.Uskov, E.V.Kurilchik: Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, 1972, 15[6], 143-6