High-pressure synthesis, crystal structures, and characterization of CdVO3−δ and solid solutions CdVO3–NaVO3

CdVO3−δ and solid solutions of Cd1−xNaxVO3 with the GdFeO3-type perovskite structure were prepared using a high-pressure (6 GPa) and high-temperature technique. No significant oxygen and cation deficiency was found in CdVO3. Cd1−xNaxVO3 are formed in the compositional range of image. CdVO3 and Cd1−xNaxVO3 demonstrate metallic conductivity and Pauli paramagnetism between 2 and 300 K. A large electronic contribution to the specific heat (image and image) for CdVO3 and Cd0.8Na0.2VO3, respectively) was observed at low temperatures due to the strongly correlated electrons. Crystal structures of CdVO3 and Cd0.8Na0.2VO3 were refined by X-ray powder diffraction: space group Pnma; image; image, image, and image for CdVO3 and image, image, and image for Cd0.8Na0.2VO3.