Figure 6. Symmetry breaks in Syn5 icosahedral lattice.

(a) A 2D representation of the T=7 lattice in Syn5, showing all the 20 triangular faces with an arrangement of the knob-like densities (green); the hexameric gp39 models are coloured as per colour scheme of Fig. 2b, while the pentameric gp39 is coloured grey. The strict icosahedral three- and two-fold symmetry axes between one set of two triangular (T) faces are marked by red triangle and oval symbols, respectively, while the local three- and two-fold axes are marked by corresponding yellow symbols. (b) A close up of two T-faces from (a) is shown enclosed in a rhombus shape (solid black lines). (c–f) An array of all the two-fold interfaces observed in Syn5, where (c) shows the strict icosahedral two-fold interface (axis, red oval) and (d–f) show the local two-fold interfaces (axes, yellow oval). (g–i) An array of all the three-fold interfaces, with (g) showing the strict icosahedral three-fold interface (axis, red triangle) and (h,i) showing the local three-fold interfaces (axes, yellow triangle).