A. I. Gusev, “Atomic displacements in the V$_{52}$O$_{64}$ superstructure and the short-range order in superstoichiometric cubic VO$_y$ vanadium monoxide with metal vacancies”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2009, Volume 90, Issue 5,Pages <nobr>418

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CONDENSED MATTER

Atomic displacements in the V$_{52}$O$_{64}$ superstructure and the short-range order in superstoichiometric cubic VO$_y$ vanadium monoxide with metal vacancies

A. I. Gusev

Institute of Solid State Chemistry, Urals Branch RAS

Abstract: Atomic displacements in the lattice of the tetragonal V₅₂O₆₄ superstructure have been experimentally determined. It has been found that atomic displacement waves, which are attributed to the formation of the short-range displacement order, appear in the vanadium and oxygen sublattices of this superstructure. It has been shown that the V₅₂O₆₄ superstructure is formed on the basis of disordered superstoichiometric cubic vanadium monoxide with the short-range order in the metallic sublattice. The character of the short-range order is such that vanadium atoms occupying tetrahedral positions are in the environment of four vacant sites of the vanadium sublattice. This means that the superstoichiometric VO_>1.0 vanadium monoxide has a cubic structure differing from the B1-type structure characteristic of most of the strongly nonstoichiometric cubic compounds MX_y (X = C, N, O) of transition metals.

PACS: 61.50.Ks, 61.66.Fn, 61.72.Dd, 64.70.Kb

Received: 28.07.2009