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Keywords:

  • high-pressure synthesis;
  • perovskite phases;
  • piezoceramics;
  • X-ray diffraction
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The monoclinic perovskite BiCo1−xFexO3 (x≈0.7) undergoes a second-order structural transition from tetragonal to monoclinic, which is accompanied by a rotation of the polarization vector from the [001] to [111] directions of a pseudo cubic cell. The crystal structure, determined by electron diffraction and powder synchrotron X-ray diffraction, was the same as that of Pb(Ti1−xZrx)O3 at the morphotropic phase boundary.