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Figure 5
(a) FWHM of all peaks plotted versus [\tan\theta] for different values of accepted blurring (Caglioti plot). The inset shows the deviation from the usual behaviour at low angles when more parts of the detector are used. (b) Rietveld analysis of the powder diffraction pattern extracted with 0.12 mm allowed blurring. Shown are the experimental data together with the fit and their difference on a square-root scale. The insets show a comparison of fits for 0.12 mm allowed blurring or when all channels are used for the {100}, {110} and {500} Bragg peaks. The curves are vertically shifted for clarity.

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