Phase formation features in the systems M2MoO4–Fe2(MoO4)3 (M=Rb, Cs) and crystal structures of new double polymolybdates M3FeMo4O15

Khal'baeva, K. M.; Солодовников, С. Ф.; Хайкина, Е. Г.; Kadyrova, Yuliya M.; Солодовникова, З. А.; Basovich, Olga M.

doi:10.1016/j.jssc.2010.01.008

Cited by 13 publications

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“…The 1D [Fe(MoO 4 ) 6 ] units encountered in the title compound can be compared to other iron molybdenum oxides reported in the literature. Rb 3 FeMo 4 O 15 23 exhibits 1D…”

Section: Magnetic Characterizationmentioning

confidence: 99%

“…3c) 26 and Cs 3 FeMo 4 O 15 (Fig. 3e), 23 the connectivity between iron octahedra and molybdenum tetrahedra is realized by assembling oxygen corners together, building a final 3D framework, more or less distorted by co-addition of counter cations. The atomic positions, anisotropic displacement parameters and the principal distances are given in ESI S2 and S3.…”

Section: Magnetic Characterizationmentioning

confidence: 99%

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Novel La₃Fe(MoO₄)₆ phase: magnetic properties and ethanol reactivity

et al. 2015

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Single crystals of a new oxide, La3Fe(MoO4)6, were grown from fluxes of oxide precursors, and a polycrystalline sample was also prepared by a standard solid state reaction. La3Fe(MoO4)6 crystallizes in the orthorhombic space group Pbca with unit cell parameters a = 19.3164(11), b = 10.4143(5) and c = 22.0594(12) Å. This crystal structure exhibits a singular architectural type built on infinite chains of Fe(MoO4)4, each of them being surrounded by two isolated MoO4 tetrahedra and three isolated La(3+) cations. Fe(3+) ions in La3Fe(MoO4)6 are antiferromagnetically ordered below TN = 6.6 K in chains and between chains, as refined from neutron diffraction data. Further the redox stability of this compound - pure powder - was checked using temperature-programmed X-ray diffraction under a controlled atmosphere; under air, we observed a reversible phase transition above 523 K. The same phenomenon was observed under a reductive atmosphere, followed by a destruction of the as-formed phase above 923 K owing to iron III to II reduction. Reactivity of ethanol was then evaluated to get insights into the redox properties of the material under working conditions. After 4 hours of reaction at 648 K, the ethanol conversion was 97% with a selectivity to acetaldehyde of ∼60%, the other products being formaldehyde (∼10%) and CO2 (∼30%), underlining a better acetaldehyde selectivity than that of the La-free conventional Fe2(MoO4)3 catalytic formulation.

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“…The 1D [Fe(MoO 4 ) 6 ] units encountered in the title compound can be compared to other iron molybdenum oxides reported in the literature. Rb 3 FeMo 4 O 15 23 exhibits 1D…”

Section: Magnetic Characterizationmentioning

confidence: 99%

Section: Magnetic Characterizationmentioning

confidence: 99%

Novel La₃Fe(MoO₄)₆ phase: magnetic properties and ethanol reactivity

et al. 2015

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“…For properties of related molybdates, see: Zhang et al (2000); Muessig et al (2003); Bramnik et al (2003); Soares & Portela (2005); Bowker et al (2008); Otko et al (1978); Klimin et al (2003); Jorge et al (2004); Maczka et al (2005). The closely related crystal structures of -K 3 Fe(MoO 4 ) 2 (Mo 2 O 7 ) and Rb 3 Fe(MoO 4 ) 2 Mo 2 O 7 were determined by Maczka et al (2009) and Khal'baeva et al (2010), respectively. For bondvalence sums, see: Brown & Altermatt (1985).…”

Section: Related Literaturementioning

confidence: 99%

“…Data collection: CAD-4 EXPRESS (Duisenberg, 1992;Macíček & Yordanov, 1992); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 1999); software used to prepare material for publication: WinGX (Farrugia, 2012 (Zhang et al, 2000;Muessig et al, 2003;Bramnik et al, 2003;Soares & Portela, 2005;Bowker et al, 2008;Otko et al, 1978;Maczka et al, 2005;Klimin et al, 2003;Jorge et al, 2004) nous a encouragés à explorer les systèmes molybdates de fer à cations monovalents. Une étude bibliographique a été effectuée sur la famille de composés de formulation AFe(III)Mo 4 O 15 où A est un cation monovalent: α-K 3 Fe(MoO 4 ) 2 (Mo 2 O 7 ) (Maczka et al, 2009), Rb 3 FeMo 4 O 15 (Khal'baeva et al, 2010). En effet, le présent travail porte sur l′étude structurale d'un molybdate de formulation β-K 3 Fe(MoO 4 ) 2 (Mo 2 O 7 ) obtenu par voie sèche.…”

Section: Data Collectionunclassified

“…La nouvelle variété β-K 3 Fe MoO 4 L'examen des facteurs géométriques dans la structure montre qu'ils sont en bon accord avec ceux rencontrés dans la littérature (Maczka et al, 2009;Khal'baeva et al, 2010). D'autre part, le calcul des valences de liaisons (BVS), utilisant la formule empirique de Brown (Brown & Altermatt, 1985), conduit aux valeurs des charges des cations suivants: Fe1 (3,03), Mo1 (6,03), Mo2 (6,13), Mo3 (5,94), Mo4 (6,03), K1 (0,61), K2 (0,71) et K3 (0,59).…”

Section: Data Collectionunclassified

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