Figure 1
Polyhedral representation of the crystal structure of (VO)2P2O7 viewed (a) along the [100] direction and (b) along the [010] direction. The VO5 square pyramids are drawn in dark grey, the PO4 tetrahedra in light grey. Large circles represent V atoms and medium circles represent P atoms. Small circles in (a) denote O atoms, which are not shown in (b). |