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Crystal Structure of (NbSe₄)₃I and (NbSe₄)_{10/3}I CDW Compounds at 14 K

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Zubko M., Kusz J., Prodan A., Bennett J., Świec P.

Acta Physica Polonica A

2016

vol. 130

issue 4

869-872

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.

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1 Acta Physica Polonica A

1 2016

1 Bennett J.

1 Kusz J.

1 Prodan A.

1 Zubko M.

1 Świec P.

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Crystal Structure of (NbSe₄)₃I and (NbSe₄)_{10/3}I CDW Compounds at 14 K