Etude par diffraction X de la structure du chromate dichromate de bismuth et de potassium monohydraté
Résumé
KBi(CrO4)(Cr2O7). H2O crystallizes in the centrosymmetric triclinic space group P-l with a = 6.853 (4), b = 7.280 (4), c = 10.703 (5) Å, alpha = 80.50 (4), beta = 88.70 (3), gamma = 85.71 (4)° and Dm = 3.79 (l), D x = 3.182 g.cm-3 for M r = 598 and Z = 2. The crystal structure of this new compound has been determined by Patterson methods and refined by least squares to R = 0.039 and Rw = 0.048 with 2877 independent reflections. The structure contains [Bi2O14 ] bidodecahedra linked together by [Cr2O7 ] and [CrO4 ] groups to build complex layers in the ab plane where [CrO4 ], [Cr2O7 ] and [Bi2O14 ] groups coexist.
Domaines
Chimie
Origine : Fichiers produits par l'(les) auteur(s)