Figure 6
From: Grain Boundary Plane Orientation Fundamental Zones and Structure-Property Relationships

Overlaid Symmetries in Experimental Interface Distributions.
An interface distribution from Rohrer et al.42 overlaid with the bicrystal symmetries of the corresponding misorientations ([001], (5o, 15o, 25o, 35o)). Note that the mirror planes (dashed red lines) capture the symmetries present in the distribution. Also note the natural rotation of the symmetries due to the increased misorientation angle. Finally, note that only a single region or FZ in any one graph is needed to describe the entire distribution, all other information is redundant. Original image from Rohrer et al42 © Carl Hanser Verlag, Muenchen is used with permission.