Figure 4
The rhombic dodecahedron (blue edges) describing the 24 disordered positions of cyclohexane at 255 K. On the left, atom labels are given, omitting their symmetry codes for clarity. Red and green molecules are related by twofold (left), threefold (middle) and fourfold (right) rotations. The twofold axis is viewed in the plane of projection, while the three- and fourfold axis are inclined with respect to that plane. The projection is viewed along [012], and the unit-cell origin is coincident with the centre of the polyhedron. |