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A kinetic analysis is made of the thermal diffusion of a dilute impurity in an fcc metal. Expressions are derived for the impurity current, the steady-state Soret gradient, and the mean-atom displacement. It is shown how the ``heats of transport'' appearing in these expressions can be studied experimentally. An extension of the analysis to cases of nonthermal type gradients, in particular a chemical concentration gradient, is briefly considered.
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Howard et al. (1962) studied this question.
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