High-Pressure Synthesis, Crystal Structure, Chemical Bonding, and Ferroelectricity of LiNbO-Type LiSbO.

A polar LiNbO (LN)-type oxide LiSbO was synthesized by a high-temperature heat treatment under a pressure of 7.7 GPa and found to exhibit ferroelectricity. The crystal structural refinement using the data of synchrotron powder X-ray diffraction and neutron diffraction and the electronic structure calculation of LN-type LiSbO suggest a covalent-bonding character between Sb and O.