Figure 3
From: Exploration of tetrahedral structures in silicate cathodes using a motif-network scheme
Examples of the structures with 3D M-Si-O framework.
Space group of each structure is (a) Pn (#7), (b) Pna21 (#33), (c) C2221 (#20), (d) Pna21 (#33), (e) P212121 (#19), (f) Pn (#7), (g) I-4 (#82) and (h) Pccn (#56). Solid arrows in (a) indicate the 2-hole ring; dash arrows in (d) indicate the 3-hole ring; dot arrows in (d) indicate the 1-hole ring. The black boxes indicate the unit cells of each structure. M- and Si- centered tetrahedra are displayed in the brown and blue colors respectively. A-O bonds are connected and displayed in green color.
