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By Jaemin Yu and Hoseop Yun


The title compound, potassium diniobium vanadium phospho­rus deca­sulfide, KNb1.75V0.25PS10, was obtained by reaction of the elements with a eutectic mixture of KCl/LiCl. It is isostructural with the quaternary KNb2PS10, but the Nb sites are occupied by statistically disordered Nb (87.5%) and V (12.5%) atoms. The structure is composed of anionic ∞ 1[M 2PS10]− chains (M = Nb/V) separated from each other by K+ ions. The chain is composed of [MS8] distorted bicapped trigonal prisms and [PS4] tetra­hedra. There are no inter­chain bonding inter­actions. The crystal used for the X-ray analysis was a racemic twin

Topics: Inorganic Papers
Publisher: International Union of Crystallography
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Provided by: PubMed Central

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  1. (2008). E67, i24 Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368supplementary materialssupplementary materials sup-1 Acta Cryst.
  2. (2000). The M atoms associate in pairs with M—M interactions alternating in the sequence of one short (2.8851 (3) Å) and one long (3.7590 (3) Å) distances. The short distance is typical of Nb4+—Nb4+ bonding interactions (Angenault et al.,
  3. (1996). The structure of KNb2 - xVxPS10 is isostructural with the quaternary KNb2PS10 and detailed description of the structure is given previously (Do & Yun,