Abstract
Cr 2V 4O 13, a tetravanadate of Cr 3+ has been prepared by repeated heating of stoichiometric amounts of Cr 2O 3 and V 2O 5 and its crystal structure is refined by Rietveld refinement of the powder XRD data. This compound crystallizes in a monoclinic lattice with unit cell parameters: a=8.2651(3), b=9.2997(3), c=14.5215(5) Å, β=102.618(3)°, V=1089.21(6) Å 3 and Z=4 (Space group: P2 1/ c). The U shaped (V 4O 13) 6− formed by corner connected VO 4 tetrahedra links the Cr 2O 10 (dimers of two edge shared CrO 6 octahedra) forming a three dimensional network structure of Cr 2V 4O 13. This compound is stable up to 635 °C and peritectically decomposes to orthorhombic CrVO 4 and V 2O 5 above this temperature. A possible long range antiferromagnetic ordering below 10 K is suggested from the squid magnetometry and electron paramagnetic resonance ( epr) spectroscopic studies of Cr 2V 4O 13.
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