Figure 5
Calculated low-symmetry spinel structure with enantiomorphic space groups P4132 and P4332. Polyhedral presentation of the ordered enantiomorphic spinel structures (atoms B4b and B12d are in the centres of white and dark octahedra) (a); double spiral from tetrahedra and hexahedra (b). The line between the structures indicates a mirror.  [article HTML]

© International Union of Crystallography 2014