New antimonate–vanadate with the rutile structure

Abstract

VCrSbO, has been prepared and its magnetic and electronic properties investigated. The crystal structure was refined from X-ray powder diffraction by the Rietveld method. The unit cell is tetragonal (space group P4,/rnnm, Z=2), a=4.5708(4) A and c=3.0281(3) A. The compound is isostructural with the rutile phase FeNbO, and stoichiometric with respect to all three constituent metals atoms. The electron diffraction pattern is consistent with a tetragonal symmetry.

Synthesis and characterization of new compound in the V–Fe–Sb–O system

“…Very often the catalytic, magnetic, optical and electrical properties can be modified by changing some of the cations in the rutile structure. Tetragonal compounds M 1 M 2 SbO 6 (where M 1 = Cr, Rh and M 2 = Ru, V, Ti, Te, Ge, Sn) with rutile-type structures have been obtained and characterized recently [14][15][16][17].…”

Influence of Cr-Substitution on the Electrical Properties of Fe_{1-x}Cr_xVSbO_6

“…The compounds with general formula M MSbO 6 , where M = Fe, Cr, Al; M = V, Ru, Ti have been reported and characterized recently because of their interesting electrical, magnetic and catalytic properties [17]. Among these FeVSbO 6 and CrVSbO 6 are isostructural and crystallize in the tetragonal system and possess a rutile-type structure (space group P 4 2 /mnm, Z = 2) [1,4,5]. A new solid solution with chemical formula Fe 1−x Cr x VSbO 6 forms also a tetragonal structure of rutile-type in the whole components concentration range (0.0 < x < 1.0) of the FeVSbO 6 CrVSbO 6 system [8].…”

Magnetic interactions in CrSbVO6 studied by EPR

“…The temperature dependence of magnetic susceptibility of CrSbVO 6 has demonstrated that the magnetic properties depend only on the crystal structure and the oxidation states of the cations involved in this compound [3]. These results have proved that CrSbVO 6 is a paramagnet and a classical semiconductor.…”

“…According to Ballarini et al when the (Cr + V)/Sb ratio is about 2 in the Cr-Sb-V-O system a compound with the formula Cr 3+ Sb 5+ V 4+ O 6 is formed [1,2]. Isasi et al has shown that CrSbVO 6 can be synthesized by heating (in evacuated silica glass tubes) a mixture of Sb 2 O 5 , Cr 2 O 3 and V 2 O 4 at 1163 K for 24 h [3].…”

“…for direct ammoxidation of propane to acrylonitrile [1,2]. The type of phases formed in this system depends, according to the published information, on the preparation method and the atomic ratio between the components [1][2][3][4]. For catalysts prepared by the co-precipitation technique from solutions comprising VO-(acac) 2 , Cr(NO 3 ) 3 Á 6H 2 O and SbCl 5 in absolute ethanol and for the (Cr + V)/Sb ratio between 2 and %1, rutile type of a Cr 3+ /V 4+ Sb 5+ mixed oxide with composition Cr 1 V x Sb 1 O 4À2x develops (0 < x < 1), that in practice corresponds to a solid solution between 1CrSbVO 4 and xVO 2 [1].…”