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Figure 3
Rietveld refinement profiles using XRD data of pyrite concentrate powder as (a) an unground control, and prepared by (b) hand grinding, (c) grease loading and (d) 7 min ball milling. The relative percentage differences between the observed (Io) and calculated (Ic) intensities are shown beneath each profile. Rietveld refinement residuals for each sample preparation are given in Table S2.

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