The self-diffusion of 22Na was studied by using a radiometric method; The results for 1120 to 1320K were described by:

D (cm2/s) = 0.0016 exp[-177.3(kJ/mol)/RT]

The dependence of the latter upon partial O activity at 1188K was given by:

D (cm2/s) = 3 x 10-11 aO21/50

when aO2 was between 0.0001 and 1.

A.J.Neiman, A.S.Kalyakin, A.F.Guseva: Izvestiya Akademii Nauk SSSR Neorganicheskie Materialy, 1990, 26[8], 1728-33. [Inorganic Materials, 1990, 26[8], 1474-81