view article
Figure 1
(a) High-temperature centrosymmetric crystal structure (P63/mmc) of hexagonal RMnO3. The arrows indicate displacements of ions at the ferroelectric phase transition. (b) Ferroelectric P63cm structure below TC. Owing to the tilting of MnO5 bipyramids, OT and OP in (a) become inequivalent O1 and O2, and O3 and O4 (×2), respectively. Also, the tilting pushes the rare earth R1 and R2 ions along the c axis, resulting in a buckling of the rare earth ions.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 40| Part 4| July 2007| Pages 730-734
doi:10.1107/S0021889807025101
Follow J. Appl. Cryst.
Sign up for e-alerts
E-alerts
Follow J. Appl. Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS