The diffusivity was measured at 270 to 400C by studying the recovery kinetics of stress-induced dichroism in an O infra-red absorption band. It was found that the results, together with previous data, could be described by:

D (cm2/s) = 1.7 x 10-1 exp[-2.54(eV)/kT]

at 330 to 1240C.

M.Stavola, J.R.Patel, L.C.Kimerling, P.E.Freeland: Applied Physics Letters, 1983, 42[1], 73-5