Antiphase Domains in Ordered Au3Cu Alloys. II. Comments on ``Electron Diffraction Study of Order in the CuAu3 Alloys'' by Watanabe and Fisher

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Abstract
The distinction between the long‐period superlattice and the ordinary antiphase domain structure in ordered alloys, which has often been misunderstood, is critically discussed with respect to the alloy Au3Cu. In particular, remarks are directed to the recently published paper by Watanabe and Fisher. Au3Cu is ordered, but the size of antiphase domains remains small even after prolonged annealing. Irrespective of apparent similarities, it is shown that Au3 Cu is not a long‐period superlattice. Some discussions concerning peculiar properties of Au3Cu are given.