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  • 1
    ISSN: 0044-2313
    Keywords: Barium ; Cadmium ; Vanadium Oxide ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cadmium in Square Pyramids of Oxygen in the Barium Cadmium Oxovanadate: Ba2Cd3(VO4)2(V2O7)Single crystals of Ba2Cd3(VO4)2(V2O7) have been prepared by crystallization of a melt of BaCO3, CdO and V2O5. It shows orthorhombic symmetry, space group D42—P212121, a = 7.206(2), b = 9.978(1), c = 19.617(3) Å, Z = 4. The crystal structure is characterized by (VO4)3- and (V2O7)4- groups, CdO6 octahedra, BaO12 and BaO9 polyhedra and with respect to Cd containing oxides unusual square pyramids of O2- around Cd2+. The observed 1∞[CdO4] zickzack chains are connected by VO4 tetrahedra, V2O7 double tetrahedra and CdO5 pyramids, forming a tunnel structure along [100]. The tunnels are filled by barium.
    Notes: Einkristalle von Ba2Cd3(VO4)2(V2O7) wurden durch Kristallisation aus einer Schmelze von BaCO3, CdO und V2O5 dargestellt. Sie zeigen orthorhombische Symmetrie, Raumgruppe D42—P212121 mit a = 7,206(2), b = 9,978(1), c = 19,617(3) Å, Z = 4. Die Kristallstruktur zeichnet sich durch VO4-Tetraeder, V2O7-Tetraederdoppel, CdO6-Oktaeder, BaO12- und BaO9-Polyeder und für Cd unübliche tetragonale Pyramiden aus. Die beobachteten 1∞[CdO4]-Zick-zack-Ketten werden durch VO4-Tetraeder, V2O7-Tetraederdoppel und CdO5-Pyramiden unter Ausbildung einer längs [100] orientierten Tunnelstruktur vernetzt. Die Tunnel sind mit Ba2+ aufgefüllt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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