Crystal Structures and Phase Transitions in A-Site Deficient Perovskites Ln 1/3 TaO 3
The synthesis and structures of the perovskites Ln1/3TaO 3 are described. As the size of the Ln cation is reduced, the compounds display a sequence of structure: P4/mmm/La → Cmmm/Ce-Gd → Pmma/Tb, Dy → Pmc21/Ho, Er. Although apparently tetragonal in
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