Yb{sub 3}CoSn{sub 6} and Yb{sub 4}Mn{sub 2}Sn{sub 5}: New polar intermetallics with 3D open-framework structures
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
Two new ternary ytterbium transition metal stannides, namely, Yb{sub 3}CoSn{sub 6} and Yb{sub 4}Mn{sub 2}Sn{sub 5}, have been obtained by solid-state reactions of the corresponding pure elements in welded tantalum tubes at high temperature. Their crystal structures have been established by single-crystal X-ray diffraction studies. Yb{sub 3}CoSn{sub 6} crystallizes in the orthorhombic space group Cmcm (no. 63) with cell parameters of a=4.662(2), b=15.964(6), c=13.140(5) A, V=978.0(6) A{sup 3}, and Z=4. Its structure features a three-dimensional (3D) open-framework composed of unusual [CoSn{sub 3}] layers interconnected by zigzag Sn chains, forming large tunnels along the c-axis which are occupied by the ytterbium cations. Yb{sub 4}Mn{sub 2}Sn{sub 5} is monoclinic space group C2/m (no. 12) with cell parameters of a=16.937(2), b=4.5949(3), c=7.6489(7) A, {beta}=106.176(4){sup o}, V=571.70(8) A{sup 3}, and Z=2. It belongs to the Mg{sub 5}Si{sub 6} structure type and its anionic substructure is composed of parallel [Mn{sub 2}Sn{sub 2}] ladders interconnected by unusual zigzag [Sn{sub 3}] chains, forming large tunnels along the c-axis, which are filled by the ytterbium cations. Band structure calculations based on density function theory methods were also made for both compounds. - Graphic abstract: Yb{sub 3}CoSn{sub 6} and Yb{sub 4}Mn{sub 2}Sn{sub 5} have been prepared and structurally characterized. Yb{sub 3}CoSn{sub 6} features a 3D open-framework composed of novel [CoSn{sub 3}] layers interconnected by the zigzag Sn chains whereas the anionic substructure of Yb{sub 4}Mn{sub 2}Sn{sub 5} is composed of parallel [Mn{sub 2}Sn{sub 2}] ladders interconnected by the unusual one-dimensional (1D) chains formed by linear [Sn{sub 3}] trimers.
- OSTI ID:
- 21128468
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 9; Other Information: DOI: 10.1016/j.jssc.2008.05.036; PII: S0022-4596(08)00287-9; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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