title: Dilead(II) chromium(III) hepta-fluoride.
abstract: Single crystals of the title compound, Pb(2)CrF(7), were obtained by solid-state reaction. The monoclinic structure is isotypic with Pb(2)RhF(7) and is built up of CrF(6) (3-) octa-hedra isolated from each other, inserted in a fluorite-related matrix of PbF(6) distorted octa-hedra, and PbF(8) square anti-prisms sharing edges and corners. The seventh F atom is 'independent', connected only to three Pb atoms within FPb(3) triangles, sharing an edge and building an almost planar Pb(4)F(2) unit, so that the formula can alternatively be written as Pb(2)F(CrF(6)).
authors.affiliation: Université du Maine, Laboratoire des Oxydes et Fluorures, CNRS UMR 6010, Avenue O. Messiaen,72085 Le Mans, France.
authors.forename: Armel
authors.initials: A
authors.lastname: Le Bail