Figure 4
(a) The CsLiSO4 structure projected on the ab plane. The cation array: Cs (grey), Li (green) and S (orange) form a cotunnite-like structure, in which Cs and Li form the trigonal prisms centred by S. The cotunnite structure is outlined by red contacts, to be compared with that shown in Fig. 3(b). We have drawn in blue the Li–S contacts to show that they form a four-connected net similar to that of the SrAl2 structure represented in (b). Red contacts connect the Al atoms (grey spheres). Orange spheres represent Sr atoms. |