The H permeability was determined, by using mass spectroscopy, to be equal to 4.0 x 10-5 cm2/s atm½ at 760C. By combining the results with known solubility data, the H diffusivity was deduced to be equal to 2.5 x 10-5cm2/s at 760C.

J.I.Zvezdin, J.I.Belyakov: Fiziko-Khimicheskaya Mekhanika Materialov, 1967, 3[3], 349-51