It was found that the B diffusivity at between 1120 and 1335C could be described by:

D(cm2/s) = 1.71 x 101exp[-3.68(eV)/kT]

J.Yomaguchi, S.Horiuchi, K.Matsumura, Y.Oejino: Journal of the Physical Society of Japan, 1960, 15, 1541