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Abstract
The areas treated in this article are:
(i) The Haeffner effect; where the light isotope moves towards the anode in all cases so far investigated.
(ii) Self diffusion and mutual diffusion.
(iii) Shear viscosity of pure isotopes of Li6 and Li7.
In the course of the discussion, the Haeffner effect is shown to be directly related to electrical resistively at the level of the lowest order Born approximation.
Models used for treating isotopic mass effects are then considered; limitations and usefulness being assessed by comparison with experimental data on liquid metals. The marked contrast with low temperature isotope effects is finally commented on.