TY - JOUR
T1 - Synthesis, crystal structure and transport properties of a new non-stoichiometric CaVO3+δ phase
AU - García-Jaca, Javier
AU - Larramendi, J. Ignacio R.
AU - Insausti, Maite
AU - Arriortua, M. Isabel
AU - Rojo, Téofilo
PY - 1995
Y1 - 1995
N2 - A non-stoichiometric calcium vanadium(iv) oxide with formula CaVO 3+δ has been synthesized via the thermal decomposition of the [Ca(VO)(±-C4H2O6)(H2O) 4]2 metallo-organic precursor at 1073 K. The morphology of the samples obtained by using this method shows the influence of the transport vapour phase formed during the ligand pyrolysis. The oxide contains an excess of oxygen, δ= +0.23, which implies that the vanadium atom exhibits an oxidation state between VIV and VV. The crystal structure of CaVO3+δ is perovskite-type with orthorhombic distortion. This distortion modifies the symmetry of the [VO6] groups as was observed from the crystal refinement. The oxide presents a transition from semiconductor to metallic character at 78 K.
AB - A non-stoichiometric calcium vanadium(iv) oxide with formula CaVO 3+δ has been synthesized via the thermal decomposition of the [Ca(VO)(±-C4H2O6)(H2O) 4]2 metallo-organic precursor at 1073 K. The morphology of the samples obtained by using this method shows the influence of the transport vapour phase formed during the ligand pyrolysis. The oxide contains an excess of oxygen, δ= +0.23, which implies that the vanadium atom exhibits an oxidation state between VIV and VV. The crystal structure of CaVO3+δ is perovskite-type with orthorhombic distortion. This distortion modifies the symmetry of the [VO6] groups as was observed from the crystal refinement. The oxide presents a transition from semiconductor to metallic character at 78 K.
UR - https://www.scopus.com/pages/publications/0000787568
U2 - 10.1039/JM9950501995
DO - 10.1039/JM9950501995
M3 - Article
AN - SCOPUS:0000787568
SN - 0959-9428
VL - 5
SP - 1995
EP - 1999
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 11
ER -