Consideration on domain walls orientations in CsPbCl3 ferroelastic crystalin the monoclinic phase

By the crystallographic consideration, all permissible domain walls were ob tained for CsPbCl3, a crystal that undergoes very complicated phase transit ion sequences. We constructed the possible domain structures and classified the domain walls into various types according to the domain structures. In particular, those by a fourfold wall, W-f; which was found by considering the wall symmetry were constructed. The results also showed that the W' wal ls, which were defined in a continuous model of the mechanical properties, are the crystallographic planes with fixed indices.