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Figure 3
Calculated diffuse-scattering patterns (upper semicircles) for PCNB compared with the corresponding observed X-ray data (lower semicircles). (a) 0kl section. (b) hk0 section. (Note the upper and lower halves are not related by m symmetry. 0kl has twofold symmetry; hk0 has sixfold symmetry. It should also be noted that the calculated patterns contain no actual Bragg peaks since the average structure is subtracted during the calculation.) |