The structure of beta-phase in Cu-Sn alloy has been studied by electron diffraction using an electron microscope equipped with a high temperature stage. From the superlattice spots it was confirmed that the beta-phase at the high temperature has a Fe 3 A1 type superlattice. Its diffraction pattern shows strong diffuse streaks which indicate the existence of low frequency transverse lattice vibrations of polarization perpendicular to <111> directions.
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Nishiyama et al. (1967) studied this question.
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