Preparation and structure of (NbSe4)3.33 I. [I3Nb10Se40] |
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| Authors: | Alain Meerschaut Pascal Gressier Louisette Guemas Jean Rouxel |
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| Affiliation: | Laboratoire de Physicochimie des Solides, L.A. 279, 2, rue de la Houssini′ere, 44072 Nantes Cedex, France |
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| Abstract: | The structural determination of a novel linear chain compound (NbSe4)3.33 I is reported. The structure was solved by means of Patterson and Fourier syntheses and refined toR = 0.030, RW = 0.040, for 566 independent reflexions [I ≥ 3σ (I)]. The structure is built up of infinite [NbSe4] chains along the c axis (tetragonal symmetry). Iodine atoms are located within the channels between these chains. The iodine atoms do not show the same distribution within all the channels as is the case for related compounds such as (NbSe4)3I, (TaSe4)2I. This new compound undergoes a phase transition at 285 K associated with a change density wave (CDW) origin. |
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