title: Li0.5Al0.5Mg2(MoO4)3.
abstract: The title compound, lithium/aluminium dimagnesium tetra-kis-[orthomolybdate(VI)], was prepared by a solid-state reaction route. The crystal structure is built up from MgO6 octa-hedra and MoO4 tetra-hedra sharing corners and edges, forming two types of chains running along [100]. These chains are linked into layers parallel to (010) and finally linked by MoO4 tetra-hedra into a three-dimensional framework structure with channels parallel to [001] in which lithium and aluminium cations equally occupy the same position within a distorted trigonal-bipyramidal coordination environment. The title structure is isotypic with LiMgIn(MoO4)3, with the In site becoming an Mg site and the fully occupied Li site a statistically occupied Li/Al site in the title structure.
authors.affiliation: Laboratory of Materials and Crystallochemistry, Faculty of Science of Tunis, University of Tunis ElManar, 2092 ElManar II Tunis, Tunisia.
authors.forename: Ines
authors.initials: I
authors.lastname: Ennajeh
authors.affiliation: Laboratory of Materials and Crystallochemistry, Faculty of Science of Tunis, University of Tunis ElManar, 2092 ElManar II Tunis, Tunisia.
authors.forename: Mohamed Faouzi
authors.initials: MF
authors.lastname: Zid
authors.affiliation: Laboratory of Materials and Crystallochemistry, Faculty of Science of Tunis, University of Tunis ElManar, 2092 ElManar II Tunis, Tunisia.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Driss