Geschlossene 1 ∞[(PtDy4O16)4]-Polyedertunnel in Ba13Dy8Zn4Pt4O37 Closed 1 ∞ [(PtDy4O16)4] Polyhedra Tunnels in Ba13Dy8Zn4Pt4O37

Abstract

Abstract Single crystals of Ba13Dy8Zn4Pt4O37 have been prepared by reaction of mixtures of BaCO3, ZnO and DyO3 at temperatures up to 1225 °C using platinum crucibles. X-ray investigations led to a new crystal structure with tetragonal symmetry, space group C4h 5-I4/m, a = 18.659(7), c = 5.734(2) Å, Z = 2. The structure is characterized by PtO6 and BaO6 octahedra as well as by tetragonal ZnO5 pyramids and single capped trigonal prisms of oxygen around dysprosium. The remaining barium positions show coordination numbers of nine and ten. The crystal structure has large ∞ 1[(PtDy4O)6)4] polyhedra tunnels. Considering the ∞ 1[Ln4O16]20- polyhedra groups some parts of the structure show similarities to BaZnLn2O5, Ba5Zn4Ln8O21 and Ba2Ln2ZnPtO8.