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Figure 1 Comparison of the powder X-ray diffraction patterns for kovdorskite. The patterns are shown vertically offset for clarity: (a) by Kapustin et al. (1980), (b) our measurement, (c) calculated pattern based on the data given by Ovchinnikov et al. (1980), and (d) calculated pattern with space group and atomic coordinates reported by Ovchinnikov et al. (1980), but a transformed unit-cell setting (see text). |