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StructureD 2000 Networks of Icosahedra in the Sodium—Zinc—Stannides Na16Zn13.54Sn13.46(5) (I),

Na22Zn20Sn19(1) (II), and Na34Zn66Sn38(1) (III). — The new phases are prepared from the elements (Ta ampules, 300—500 °C, 30 d) and characterized by single crystal XRD. (I) crystallizes in the orthorhombic space group Ibam with Z = 8, (II) in the ortho-rhombic space group Pnma with Z = 4, and (III) in the trigonal space group R3 with Z = 3. The structures consist of complex three-dimensional cluster networks made of Zn and Sn atoms with the common motif of Kagome nets of icosahedra. In addition to the new {Zn12-xSnx} icosahedra, triangular units, cages, and pairs of triply fused icosa-hedra fill the cavities of the Kagome nets in compounds (I), (II), and (III), respectively. — (KIM, S.-J.; FAESSLER*, T. F.; J. Solid State Chem. 182 (2009) 4, 778-789; Dep. Chem., TU Muenchen, D-85747 Garching, Germany; Eng.) — W. Pewestorf

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ChemInform 2009, 40, issue 01 © 2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim