
Figure 10
The (2kl) plane at 84 K for (a) the ordered LS phase (LSord) and (b) the disordered phase (LSdis). In the ordered phase (a) the marked reflections can all be indexed with integer hkl values in the hexagonal phase. (b) Triclinic indices of split main reflections and new nonsplit reflections. The split reflections correspond to two slightly separated reflections from all three twins, while the nonsplit reflections correspond to just one of the three twins. This latter group lies at k + ½ in the hexagonal reciprocal lattice. 