The diffusion of V in 4N-purity material was measured at 800 to 1300C. The results were described by:

D (cm2/s) = 8.7 x 10-1 exp[-66.5(kcal/mol)/RT]

S.P.Murarka, M.S.Anand, R.P.Agarwala: Acta Metallurgica, 1968, 19[1], 69-72