The diffusivity of F was determined by using a double solid-state cell at 757 to 920C. The data could be described by:

D (cm2/s) = 9.32 x 10-2 exp[-23.6(kcal/mol)/RT]

S.N.S.Reddy, R.A.Rapp: Metallurgical Transactions B, 1978, 9[12], 559-65