view article
Figure 6
Schematic diagrams of the polarization rotation paths for Pb displacement vectors in the monoclinic mirror planes in the (a) MA/MB and (b) MC structures. The large red atom at the centre of the unit cell is Pb, while the blue atoms are the surrounding O atoms of the PbO12 cage. The small yellow atoms are the B-site cations Zr or Ti. Arrows indicate possible vector directions.

IUCrJ
Volume 5| Part 1| January 2018| Pages 73-81
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517016633