title: One-dimensional array of two- and three-center cation-cation bonds in the structure of Li4[(UO2)10O10(Mo2O8)].
abstract: Dark-red crystals of the new compound Li(4)[(UO(2))(10)O10(Mo(2)O(8))] (1) have been obtained by high-temperature solid-state reactions. The structure of 1 (monoclinic, P2(1)/c, a = 7.9426(4) A, b = 19.9895(9) A, c = 10.0796(5) A, beta = 90.575(2) degrees, V = 1600.24(13) A(3), Z = 4) consists of a framework of U and Mo polyhedra with Li+ cations in the channels. The framework contains seven-polyhedra-wide uranium oxide tapes interlinked by dimers of edge-sharing [4 + 1]-distorted MoO(5) polyhedra. The U-O tapes are parallel to the a axis, and their planes are oriented parallel to (021) and (02) so that they are cross-linked within the framework. The core of the tapes consists of unprecedented one-dimensional arrays of cation-cation-bonded uranyl ions. The arrays are constructed from eight-membered cycles with uranyl ions linked through two- and three-center cation-cation interactions.
authors.affiliation: Institut für Geowissenschaften, Kiel University, Olshausenstrasse 40, 24118 Kiel, Germany.
authors.forename: Evgeny V
authors.initials: EV
authors.lastname: Alekseev
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Krivovichev
authors.forename: Thomas
authors.initials: T
authors.lastname: Malcherek
authors.forename: Wulf
authors.initials: W
authors.lastname: Depmeier