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Crystal structure and properties of the Na1−x Ru2O4 phase

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Abstract

Sodium ruthenium(III,IV) oxide Na1−x Ru2O4 was synthesized by the solid state reaction of Na2CO3 and RuO2 in inert atmosphere and characterized by X-ray powder diffraction, electron diffraction, and high-resolution transmission electron microscopy. The compound crystallizes in the CaFe2O4-type structure (space group Pnma, Z = 4, a = 9.2641(7) Å, b = 2.8249(3) Å, c = 11.1496(7) Å). Double rutile-like chains of the RuO6 octahedra form a three-dimensional framework, whose tunnels contain sodium cations. The structure contains two crystallographically independent sites of ruthenium atoms randomly occupied by the RuIII and RuIV cations. The superstructure with the doubled b parameter found for one of the samples under study using electron diffraction is caused, probably, by ordering of the Ru cations in the rutile-like chains. The Na1− x Ru2O4 compound exhibits temperature-independent paramagnetism with χ0 = 1.9·10−4 cm3 (mole of Ru−1).

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Authors and Affiliations

  1. Department of Chemistry, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119992, Moscow, Russian Federation

    R. V. Panin, N. R. Khasanova, A. M. Abakumov & E. V. Antipov

  2. EMAT University of Antwerp (RUCA), 171 Groenenborgerlaan, 2020, Antwerp, Belgium

    A. M. Abakumov & J. Hadermann

  3. Max-Planck Institute of Chemical Solid State Physics (CPfS), 40 Nöthnitzer, 01187, Dresden, Germany

    W. Schnelle

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  1. R. V. Panin
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  2. N. R. Khasanova
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  3. A. M. Abakumov
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  4. W. Schnelle
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  5. J. Hadermann
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  6. E. V. Antipov
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1655–1660, October, 2006.

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Panin, R.V., Khasanova, N.R., Abakumov, A.M. et al. Crystal structure and properties of the Na1−x Ru2O4 phase. Russ Chem Bull 55, 1717–1722 (2006). https://doi.org/10.1007/s11172-006-0478-6

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  • DOI: https://doi.org/10.1007/s11172-006-0478-6

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