International
Tables for
Crystallography
Volume H
Powder diffraction
Edited by C. J. Gilmore, J. A. Kaduk and H. Schenk

International Tables for Crystallography (2018). Vol. H, ch. 2.8, p. 181

Figure 2.8.11 

H. Ehrenberg,a* M. Hinterstein,a A. Senyshynb and H. Fuessc

aInstitut für Angewandte Materialien (IAM-ESS), Karlsruhe Institut für Technologie (KIT), Eggenstein-Leopoldshafen, Germany,bTechnische Universität München, Garching b. München, Germany, and cTechnische Universität Darmstadt, Darmstadt, Germany
Correspondence e-mail:  helmut.ehrenberg@kit.edu

[Figure 2.8.11]
Figure 2.8.11

Rietveld refinement based on different patterns of 0.92Bi0.5Na0.5TiO3–0.06BaTiO3–0.02K0.5NbO3 (a) in the unpoled and (b) in the applied field state at 6 kV mm−1. Experimental data are shown by grey crosses, black lines denote calculated profiles, and the lower plot shows their difference. Calculated positions of Bragg reflections are shown by vertical tick marks, where the different rows correspond to the initial tetragonal phase with space group P4bm (1) and the field-induced rhombohedral phase with space group R3c (2). Arrows mark superlattice reflections of type ½{ooe} and the circle highlights the rhombohedral split 331C reflection.