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Figure 2
Examples of diffraction images from non-merohedrally twinned crystals. (ad) A crystal with unit-cell dimensions fulfilling the condition: 4acosβ + c = 0, which leads to an overlap of reflections on every second line with l = 2n: (a) the diffraction pattern, (bc) two possible indexing schemes, (d) a scheme explaining the underlying geometry. (eh) A crystal with an overlap of every fourth line with l = 4n and unit-cell dimensions fulfilling 8acosβ + c = 0. (e) The diffraction image, (fg) two possible interpretations, (h) the explanation.

Journal logoBIOLOGICAL
ISSN: 1399-0047
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