Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Crystal Structure of a New Pentanary Thiophosphate, K0.5Ag0.5Nb2PS10

  • Dong, Yong-Kwan (Department of Molecular Science and Technology, Ajou University) ;
  • Kim, Sang-Rok (Department of Molecular Science and Technology, Ajou University) ;
  • Yun, Ho-Seop (Department of Molecular Science and Technology, Ajou University) ;
  • Lim, Han-Jo (Department of Electrical and Computer Engineering, Ajou University)
  • Published : 2005.02.20
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Abstract

Single crystals of the new pentanary thiophosphate, $K_{0.5}Ag_{0.5}Nb_2PS_{10}$ has been prepared through reactions of the elements with halide fluxes. The structure of $K_{0.5}Ag_{0.5}Nb_2PS_{10}$ has been analyzed by single crystal X-ray diffraction technique. The structure of $K_{0.5}Ag_{0.5}Nb_2PS_{10}$ is made up of one-dimensional ${^{\infty}_1}[Nb_2PS_{10}]$ chains along the [001] direction and these chains are separated from one another by $Ag^+$ and disordered $K^+$ ions. This chain is basically built up from bicapped trigonal prismatic [Nb2S12] units and tetrahedral [PS4] groups. The [$Nb_2S_{12}$] units are connected together to form the linear chain, ${^{\infty}_1}[Nb_2S_9]$ by sharing the S-S prism edge. Short (2.885(2) $\AA$ or 2.888(2) $\AA$) and long (3.743(1) $\AA$) Nb-Nb distances are alternating along the chain, and the $S_2{^2-}]\;and\;S^{2-}$anionic species are observed. The distorted octahedral coordination around the $Ag^+$ ion can be described as [2+4] bonding interaction.

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References

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