Figure 2
Structure of LiNbO3. (a) and (b) show views along the [001] and [110] directions, respectively. The hexagonal unit cell is shown using solid lines. Dashed arrows depict shortest Nb—Nb bonds. Solid and dashed circles mark two non-equivalent positions of Nb atoms, for which the oxygen octahedra have different orientations. They are mirrored with respect to the (110) plane. |