Figure 2
Selected sections of the experimental reciprocal space for BaVS3 in the 70–295 K temperature range. (a) In the hk3 and 0kl sections taken for the hexagonal phase at 295 K, the red circles highlight 00l and hhl reflections with l = 2n+1, which violate the hexagonal space group P63/mmc. The symmetry of the patterns indicates the 6/mmm Laue class. (b) In the 0kl section taken at different temperatures between 70 and 220 K, the red arrows point to rows of 0kl reflections with l = 2n+1, which violate the orthorhombic space group Ccm21. |