Figure 9.

Reciprocal-space map symmetries for simulated samples. (a) Zonally symmetric spherical function with ℓ_max = 12 with its maximum around a great circle and a minimum at the poles, similar to the reciprocal-space maps of sample ‘M’. (b) Spherical function with ℓ_max = 2, similar to the reciprocal-space maps of sample ‘T’. (c) Spherical functions with ℓ_max = 8, with no particular symmetry constraints, similar to the reciprocal-space maps of sample ‘mammoth’. The color of the surface of each spherical function indicates its amplitude on a linear scale, scaled according to the largest and smallest value of each spherical function.