Synthesis and structure determination of a novel lithium copper vanadate LiCu2VO4(OH)2 |
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Authors: | Dora Hoyos Jean-Louis Paillaud Jean-Louis Guth |
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Institution: | aDepartamento de Ingeniería Química, Universidad de Antioquia, Medellín, Colombia;bLaboratoire de matériaux minéraux, CNRS UMA 7016, ENSCMu, université de Haute Alsace, 3, rue Alfred Werner, 68093 Mulhouse cedex, France |
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Abstract: | A novel lithium copper vanadate LiCu2VO4(OH)2 (I) and Volborthite Cu3V2O7(OH)2 are two phases obtained at 170 °C by hydrothermal synthesis during the study of the CuO; V2O5; Li2O; H2O system. Compound (I) crystallizes in the orthorhombic system, with the space group P212121 (No. 19) and with the unit-cell parameters a=9.6086(2) Å, b=8.4482(2) Å, c=5.8938(1) Å. The structure was determined from powder by an “ab initio” method using the EXPO software and refined with GSAS, a Rietveld refinement package. Wave-like layers of rutile-type copper chains sharing vertex with the neighbor chains, are linked into a three-dimensional framework by rows of alternating tetrahedra of vanadium and trigonal bipyramids of lithium which share edges and vertices with the copper octahedra. |
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Keywords: | Lithium copper vanadate Hydrothermal synthesis Structure determination from powder Three-dimensional framework |
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