Electrochemical methods were used to study the diffusion of F at 1023 to 1223K. The results could be described by:

D (cm2/s) = 2.13 x 10-3 exp[-118.6(kJ/mol)/RT]

S.N.S.Reddy, R.A.Rapp: Metallurgical Transactions, 1980, 11[3], 99-106