title: La variété β-NaMoO(2)(AsO(4)).
abstract: The title compound, sodium dioxidomolybdenum(VI) arsenate(V), β-NaMoO(2)AsO(4), was prepared by solid-state reaction at 953 K. In the crystal structure, the AsO(4) tetra-hedra and MoO(6) octa-hedra (both with m symmetry) share corner atoms to form a three-dimensional framework that delimits cavities parallel to [010] where disordered six-coordinated sodium cations (half-occupation) are located. Structural relationships between the different orthoarsenates of the AMoO(2)AsO(4) series (A = Ag, Li, Na, K and Rb) are discussed.
authors.affiliation: Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences, Université de Tunis-El Manar, 2092 El Manar, Tunis, Tunisie.
authors.forename: Soumaya
authors.initials: S
authors.lastname: Ben Hlila
authors.forename: Mohamed Faouzi
authors.initials: MF
authors.lastname: Zid
authors.forename: Ahmed
authors.initials: A
authors.lastname: Driss