|
Figure 4
Projections parallel to [100] of (a) the interrupted tetrahedral framework, (b) the mixed tetrahedral–octahedral framework and (c) the whole crystal structure of Cs4Ca[Si8O19] are shown here. Octahedra around the Ca ions are presented in orange, while the Cs atoms are illustrated as larger green spheres. Cs—O bonds are indicated as well. |