Figure 1
Schematic illustration of zone-axis CBED patterns for a pair of enantiomorphic crystals. (a) and (b) are those taken along an appropriate zone-axis orientation, in which Bijvoet pairs of reflections are observed symmetrically with respect to the symmetry line m–m′. (c) and (d) are those taken along a `non-appropriate zone-axis orientation', in which none of the ZOLZ and FOLZ reflection pairs is a Bijvoet pair. The nomenclatures a, b, c,… indicated at reflection disk positions schematically depict phase angles of the corresponding reflection disks. |