The structure of Sapriel's W'-wall of ferroelastic domain has been studied on the basis of a simple continuum model as well as a lattice model, by which the ferroelastic domains in the 2/m crystal induced from the 4/m crystal are covered. Distortion of unit cells in and near the W'-wall is depicted, using the results obtained by a lattice model.
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Yoshihiro Ishibashi (1979) studied this question.
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