Fig. 6: Silver shells of SD/Ag90a.
From: A Keplerian Ag90 nest of Platonic and Archimedean polyhedra in different symmetry groups
a A view through the common threefold axes of SD/Ag90a. There are four of these rotational axes. b A view through a twofold axis of the outer icosahedral Ag shell of SD/Ag90a, which corresponds with a fourfold axis through the middle and inner octahedral Ag shells. There are three of these rotational axes, arranged orthogonally. c, d The corresponding triple nest with regular polyhedral shells viewed along the three- and twofold axes of the nest.
