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Figure 4
Images of the reconstructed reciprocal space. (a) The projection of the reciprocal space of Cr3_HH266 viewed down [010] showing the unit cell of the 6R polytype with the threefold superstructure along c*. (b) The [010] projection of Cr2_HH266 with much less additional reflections along c* compared to (a). The reciprocal unit cell corresponds to the nolanite-type phase. (c) [h0{\bar h}l] reflections of Cr3_HH266, i.e. a single slice of the reciprocal space, cut out of the projection in (a). In comparison to Cr2_HH266 additional streaks are visible. (d) [hh{\overline {2h}}l] reflections of Cr2_HH266. The systematic extinctions of the c-glide plane are slightly violated due to additional reflections from the rhombohedral phase. The grid represents the projection of the reciprocal unit cell onto the image plane.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 80| Part 3| June 2024| Pages 182-192
https://doi.org/10.1107/S2052520624002683
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