A recent six-frequency model advanced for describing diffusion in the L12 structure was used, in the strong order limit, to analyse certain aspects of the tracer diffusion in Ni3Al and Ni3Ge. Given information about the tracer diffusion coefficients and composition it was possible to place limits on the exchange frequencies and to estimate the level of order in terms of the exchange frequencies.

Analysis of Diffusion in Ni3Al and Ni3Ge. Belova, I.V., Murch, G.E.: Defect and Diffusion Forum, 1997, 143-147, 321-6