Figure 1
(a) A schematic presentation of the monoclinic unit cell (unprimed axes) and pseudo-orthorhombic unit cell (primed axes), showing the cell–supercell relationship. (b) A section of the reciprocal lattice, which shows the overlapped (h = 3n) and non-overlapped (h ≠ 3n) reflections of the two crystallites in the twinned crystal. Peaks outlined in lighter (green in the electronic version of the paper) and darker (blue) circles correspond to the two orientations of the crystallites. |