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2016 | 130 | 4 | 869-872
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Crystal Structure of (NbSe₄)₃I and (NbSe₄)_{10/3}I CDW Compounds at 14 K

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Both (NbSe₄)₃I and (NbSe₄)_{10/3}I compounds are interesting system possessing quasi one-dimensional linear chain character and exhibiting nonlinear transport properties with a second order phase transition. The compounds are built of NbSe₄ antiprisms, stacked along the tetragonal c axis into chains in a screw-like arrangement. Performed X-ray low temperature single crystal diffraction measurements allowed to solve, refine and analyze crystal structures of both compounds at 14 K. While (NbSe₄)_{10/3}I compound undergoes structural phase transition to monoclinic phase, (NbSe₄)₃I remains in tetragonal symmetry. Iodine atoms are responsible for the differences in (NbSe₄)_{10/3}I and (NbSe₄)₃I structures causing different spacing in the infinite NbSe₄ chains.
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
  • Institute of Physics, University of Silesia, Katowice, Poland
  • Jožef Stefan Institute, Ljubljana, Slovenia
  • Department of Physics, Acadia University, Wolfville, Canada
  • Institute of Materials Science, University of Silesia, Chorzów, Poland
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