Figure 13

The comparison of structural parameters between amorphous BT2 (melt or glass) and two crystalline phases: (a) the bond angle distribution of O-Ti-O pairs; (b) the Ba-O polyhedra distribution and the average coordination number (CN) of oxygen around cation Ba (inset); (c) the coordination environment between Ti-O polyhedra and the average CN (inset); (d) the type of connection modes between Ti-O polyhedra.