title: The lanthanum(III) molybdate(VI) La(4)Mo(7)O(27).
abstract: Crystals of the ortho-rhom-bic phase La(4)Mo(7)O(27) (lanthanum molybdenum oxide) were obtained from a non-stoichiometric melt in the pseudo-ternary system La(2)O(3)-MoO(3)-B(2)O(3). In the crystal structure, distorted square-anti-prismatic [LaO(8)] and monocapped square-anti-prismatic [LaO(9)] polyhedra are connected via common edges and faces into chains along [010]. These chains are arranged in layers that alternate with layers of [MoO(4)] and [MoO(5)] polyhedra parallel to (001). In the molybdate layers, a distorted [MoO(5)] trigonal bipyramid is axially connected to two [MoO(4)] tetra-hedra, forming a [Mo(3)O(11)] unit.
authors.affiliation: Institute of Crystallography, University of Cologne, 50674 Cologne, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: van der Wolf
authors.forename: Peter
authors.initials: P
authors.lastname: Held
authors.forename: Petra
authors.initials: P
authors.lastname: Becker