Étude structurale d'aldimines derivées des furanne-, thiophène- et N-méthylpyrrolecarboxaldéhydes-2.I. N-hétéroarylidèneanilines

Synthèse et étude structurale de Na9Cr(MoO4)6

The title compound, nona-sodium chromium(III) hexa-kis[molybdate(VI)], Na9Cr(MoO4)6 was prepared by solid-state reactions. The basic structure units are isolated polyhedral clusters composed of a central CrO6 octa-hedron sharing vertices with six MoO4 tetrahedra to form an open framework in which the Na(+) cations are bound to the free vertices of the MoO4 tetra-hedra. The Cr(3+) cation has sit...

Elaboration, étude structurale et analyse CHARDI et BVS d’une nouvelle variété β-Na9Cr(MoO4)6 de type alluaudite

The title compound, nonasodium chromium(III) hexakis[molybdate(VI)], β-Na9CrMo6O24, was prepared by solid-state reactions. This alluaudite-type structure is constituted of infinite layers formed by links between M 2O10 (M = C/Na) dimers and MoO4 tetra-hedra. The Na(+) and Cr(3+) cations are located in the same site with, respectively, 0.25 and 0.75 occupancies. The layers are connected to each ...

Contribution des sous-ensembles flous à l'aide à la décision et à l'analyse structurale

Environnements de visualisation pour l'évaluation des performances des systèmes parallèles : étude, conception et réalisation

Concevoir des assistants intelligents pour des applications fortement orientées connaissances : problématiques, enjeux et étude de cas

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