Figure 2
Data-collection scheme. (a) Schematic of crystal at the beginning and end of sweeps, viewed along the beam axis. Since the beam center was not centered on the eucentric point of the goniometer, different parts of the crystal were immersed in the beam at different points in data collection. The effect is exaggerated for clarity. (b) Proposed twin domain structure of the crystal. `+' and `−' refer to the relative orientations of the domains. |