Meridional profiles of the off-meridional intensities obtained from the four patterns shown in Fig. 3. The meridional profiles were integrated within the range of ±0.018 nm−1 on both sides of the meridian. The 10 and 11 row lines were obtained by integration within intervals (0.018–0.031 nm−1) and (0.031–0.61 nm−1). The high-angle slice was obtained by integration at reciprocal radii of 0.061–0.105 nm−1. Some layer lines of interest are labeled. Rigor, high- and low-temperature contractions, and relaxed patterns are shown by dashed, solid black, gray, and dotted lines, respectively.