title: GeTe(2)O(6), a germanium tellurate(IV) with an open framework.
abstract: The structure of an already evidenced but still uncharacterized GeTe(2)O(6) phase consists of isolated GeO(6) octahedra connected via isolated TeO(3) units. The germanium cations occupy a site with 1 symmetry. The Te and O atoms are in general positions of the P2(1)/n space group. This structure corresponds to a new type of tetravalent tellurate and is different from other AB(2)X(6) structures in which the B cation presents a stereochemically active electronic lone pair. It derives from the pseudo-hexagonal MI(2)O(6) (M = Mg, Mn, Co and Fe) type by a strong monoclinic distortion caused by the much smaller size of Ge(4+) compared with the divalent M cations.
authors.affiliation: Science des Procédés Céramiques et de Traitements de Surface, UMR-CNRS 6638, Université de Limoges, Faculté des Sciences et Techniques, 123 Avenue A. Thomas, Limoges 87060, France.
authors.forename: Nefla
authors.initials: N
authors.lastname: Jennene Boukharrata
authors.forename: Philippe
authors.initials: P
authors.lastname: Thomas
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Laval