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Structure cristalline du fluoroindate de rubidium RbIn3F10

1977; Pergamon Press; Volume: 39; Issue: 6 Linguagem: Inglês

10.1016/0022-1902(77)80241-8

1878-1225

J.C. Champarnaud-Mesjard, D. Mercurio, B. Frit,

Fluorine in Organic Chemistry

Abstract RbIn3F10 crystallises in the orthorhombic system with unit cell parameters a = 7,747 A , b = 6,655 A , c = 8,024 A (Z = 2) and P222 1 space group. The structure was solved by using three-dimensional Patterson and Fourier techniques on the basis of 324 independent reflexions measured on integrated Weissenberg films. It was refined by a full matrix least-squares procedure to a conventional agreement index R = 0,054. Indium atoms present two different kinds of coordination: 1 3 are 6-coordinated (octaedra), 2 3 are 7-coordinated (pentagonal bipyramid). All these fluorinated polyhedras, sharing either edges or corners form a three dimensional framework (In3F10)− with tunnels parallel to Oz axis where are located [8 + 2]-coordinated rubidium atoms. This structure, like hexagonal RbxFeF3 bronzes, has been shown to derive from ReO3 structure by complex shear and insertion process.