Preparation et structure cristalline de I0.33NbSe4(I4Nb12Se48) |
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Authors: | A. Meerschaut P. Palvadeau J. Rouxel |
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Affiliation: | Laboratoire de Chimie Minérale A, Equipe de Recherche Associée au C.N.R.S. no. 472, B.P. 1044-44037 Nantes Cédex, France |
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Abstract: | Single crystals with I0.33NbSe4 composition are grown, along with NbSe2 crystals, by iodine vapor transport from NbSe3. Single phase powder is obtained by heating the elements in corresponding proportions at 700°C. The structure has been studied by X-ray diffraction on a single crystal. The symmetry is tetragonal with the following parameters of the unit cell a = 9.489 Å, c = 19.13 Å. The space group is with Z = 12. The structure is built up with chains of rectangular [NbSe8]-antiprisms. Iodine atoms are located between these chains. |
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