Figure 2
The close-packing of anions in the structure. Projection parallel to the b axis, with the c axis vertical. The outlines of a unit cell and the boundaries of one eutactic layer are marked. Anions are large and cations small. The colours of the atoms are as given in Fig. 1, except for the mixed S/I site which is drawn as a single green atom. Shading expresses depth along the projection direction. |