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V8C7–δ superstructure in nonstoichiometric vanadium carbide powders

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Abstract

Neutron and X-ray diffraction methods have been applied jointly to study the crystal structure of the ordered phase of V8C7–δ in macro- and nanocrystalline vanadium carbide powders. The deviation of the composition of the ordered V8C7–δ phase from the stoichiometric composition V8C7 has been established. The magnitudes and directions of the displacements of C and V atoms have been determined. It has been shown that vanadium atoms are displaced towards a vacancy, increasing the electron density of the vacancy position of the carbon sublattice.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    A. I. Gusev & A. S. Kurlov

  2. Joint Institute of Nuclear Research, Dubna, Moscow region, 141980, Russia

    I. A. Bobrikov & A. M. Balagurov

Authors
  1. A. I. Gusev
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  2. A. S. Kurlov
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  3. I. A. Bobrikov
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  4. A. M. Balagurov
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Corresponding author

Correspondence to A. I. Gusev.

Additional information

Original Russian Text © A.I. Gusev, A.S. Kurlov, I.A. Bobrikov, A.M. Balagurov, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheckoi Fiziki, 2015, Vol. 102, No. 3, pp. 179–185.

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Gusev, A.I., Kurlov, A.S., Bobrikov, I.A. et al. V8C7–δ superstructure in nonstoichiometric vanadium carbide powders. Jetp Lett. 102, 154–160 (2015). https://doi.org/10.1134/S0021364015150035

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  • DOI: https://doi.org/10.1134/S0021364015150035

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