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The title compounds are prepared by heating the elements or binary sulfides in alumina crucibles (1173 K, 48 h) and characterized by single crystal XRD, magnetic measurements, and 151 Eu/ 119 Sn Moessbauer spectroscopy. Eu5Sn3S12 and Eu4LuSn3S12 crystallize in the orthorhombic space group Pmc21 with Z = 2. The crystal structures contain one-dimensional chains of edge-sharing SnS6 octahedra and corner-sharing SnS 5 trigonal bipyramids. Five Eu sites are seven-or eightfold coordinated by S atoms. Lu atoms in Eu4LuSn3S12 show a strong site preference for one of the two Eu 3+ positions of Eu5Sn3S12. Magnetic ordering for Eu5Sn3S12 and Eu4LuSn3S12 sets in below 5 and 3 K, respectively. -(JAKUBCOVA, P.; JOHRENDT*, D.; SEBASTIAN, C. P.; RAYAPROL, S.; POETTGEN, R.; Z. Naturforsch., B: Chem. Sci. 62 (2007) 1, 5-14; Fachbereich Chem. Biochem.,

Neue leichte Gesteinskörnungen werden durch rohstoffliches Recycling aus heterogenem und feinkörnigem Mauerwerkbruch hergestellt. Die Erprobung dieser Aufbaukörnungen im Leichtbeton liefert Aussagen zu ihrer Qualität und Eignung. Nach einer kurzen Charakterisierung der für die Betonherstellung ausgewählten Aufbaukörnungen werden die entworfene Betonrezeptur vorgestellt und einige Ergebnisse der Festbetonuntersuchungen diskutiert.

Structure D 2000 Structure and Properties of Mixed-Valence Compound Eu5Zr3S12. -Needle-shaped crystals of the title compound and Eu 3.67 Sr 1.33 Zr 3 S 12 are prepared by solid state reactions of mixtures of the elements and ZrS2 (943-1275 K, 72-130 h) and characterized by single crystal XRD. The compounds crystallize isotypically in the hexagonal space group P62m with Z = 1. The structure contains one-dimensional chains of edge-sharing ZrS6 octahedra. 151 Eu Moessbauer spectroscopy and magnetic measurements prove the existence of three Eu 2+ and two Eu 3+ ions in the unit cell of the Curie paramagnetic compound Eu5Zr3S12. -(JAKUBCOVA, P.; SCHAPPACHER, F. M.; POETTGEN, R.; JOHRENDT*, D.