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Figure 2
Rietveld refinement fitting of PMN XRD data with (a) the [Pm\bar 3m] model, (b) the R3m model and (c) the [Pm\bar 3m] and R3m model. Insets show the fitting of peaks in the q range ∼ 5–7 Å−1. Here red dots represent the synchrotron XRD data; black and blue lines represent the fitted curve and the difference curve, respectively, and green vertical ticks correspond to the Bragg positions. For the two-phase model (i.e. `c') the upper and lower green vertical ticks correspond to the Bragg positions of the [Pm\bar 3m] and R3m phases, respectively.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 72| Part 3| June 2016| Pages 404-409
doi:10.1107/S2052520616006508
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