Figure 2 - full size

Figure 2.
Figure 2 Self-rotation function maps of ROO for (a) the = 85° section and (b) the = 180° section. Non-crystallographic symmetry is recognized by peak heights of 69% of the origin peak. The pseudo-fourfold rotation axis (a) is parallel to c, with its maximum at = 84.1°; the twofold rotation axis (b) lies at = 42.9, = 90.0°. Map contouring is at 1 .