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Synthesis and Electrical Properties of a Fluorite-Like Nd5Mo3O16 Compound with Partial Substitution of Molybdenum by Tungsten, Niobium, or Vanadium

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Abstract

The phase formation of Nd5Mo3 – xW x O16.5, Nd5Mo3 – xNb x O16.5 – х/2, and Nd5Mo3 – xV x O16.5 – х/2 solid solutions based on a fluorite-like Nd5Mo3O16.5 compound (mixed conductor with interstitial oxygen conductivity) has been studied. The electrical conductivity of doped compounds obeys the Arrhenius law and, at a low impurity content, is as high as 0.03–0.08 S/cm at 800°C. Substitution of Mo6+ cations by V5+ and Nb5+ cations reduces the interstitial oxygen content, which causes a decrease in the solid-solution electrical conductivity by 1–2 orders of magnitude and a decrease in the cubic unit-cell parameter. A wide diffuse anomaly with a maximum of about 1500–4000 has been observed in the temperature dependence of the permittivity for all single-crystal and polycrystalline samples in the range of 300–900°C.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119991, Russia

    V. I. Voronkova, E. P. Kharitonova & E. I. Orlova

Authors
  1. V. I. Voronkova
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  2. E. P. Kharitonova
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  3. E. I. Orlova
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Correspondence to V. I. Voronkova.

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Original Russian Text © V.I. Voronkova, E.P. Kharitonova, E.I. Orlova, 2018, published in Kristallografiya, 2018, Vol. 63, No. 1, pp. 139–143.

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Voronkova, V.I., Kharitonova, E.P. & Orlova, E.I. Synthesis and Electrical Properties of a Fluorite-Like Nd5Mo3O16 Compound with Partial Substitution of Molybdenum by Tungsten, Niobium, or Vanadium. Crystallogr. Rep. 63, 127–131 (2018). https://doi.org/10.1134/S1063774518010212

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  • DOI: https://doi.org/10.1134/S1063774518010212

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