β-Nb(9)VO(25)

The title compound, nona­niobium vanadium penta­cosa­oxide, was prepared by a solid-state reaction at 1198 K. It is isotypic with Nb(9)AsO(25), Nb(9)PO(25) and Ta(9)VO(25). The structure consists of NbO(6) octa­hedra (one with 4/m.. and two with m.. symmetry) and VO(4) tetra­hedra (-4.. symmetry) sh...

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Detalles Bibliográficos
Autores principales: Nasri, Rawia, Chérif, Saïda Fatma, Zid, Mohamed Faouzi, Driss, Ahmed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2014
Materias:
Inorganic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4011284/
https://www.ncbi.nlm.nih.gov/pubmed/24860297
http://dx.doi.org/10.1107/S1600536814007831
Descripción
Sumario:The title compound, nona­niobium vanadium penta­cosa­oxide, was prepared by a solid-state reaction at 1198 K. It is isotypic with Nb(9)AsO(25), Nb(9)PO(25) and Ta(9)VO(25). The structure consists of NbO(6) octa­hedra (one with 4/m.. and two with m.. symmetry) and VO(4) tetra­hedra (-4.. symmetry) sharing corners and edges to form a three-dimensional framework. This framework can be considered as a junction between ribbons made up from NbO(6) octa­hedra and chains of NbO(6) octa­hedra and chains of VO(4) tetra­hedra. The V site shows half-occupancy, hence one half of the VO(4) tetra­hedra is unoccupied. The structural differences with α-Nb(9)VO(25), VOSO(4), SbOPO(4) and NbOPO(4) oxides are discussed.

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