Na2.8Cu5Sn5.6: A Crystalline Alloy Featuring Intermetalloid equation image Double-Walled Nanorods with Pseudo-Five-Fold Symmetry

Authors

  • Dipl.-Chem. Saskia Stegmaier,

    1. Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching (Germany)
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  • Prof. Dr. Thomas F. Fässler

    Corresponding author
    1. Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching (Germany)
    • Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching (Germany)
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  • We thank R. Brimioulle for synthetic work, M.B. Boeddinghaus and I. Werner for SQUID measurements, and A. Hoffmann for taking the SEM pictures. S.S. would also like to thank the Studienstiftung des Deutschen Volkes for a PhD fellowship.

Abstract

original image

Not quasi-crystalline: Approximate five-fold symmetry appears in bronze-type Cu–Sn rods that are separated by Na atoms in Na2.8Cu5Sn5.6 (see picture). The rods are compared to the [Sn@Cu12@Sn20]12− cluster in the recently characterized A12Cu12Sn21 phases (A=Na–Cs), and a saltlike description in analogy to Zintl phases of p-block metals is introduced for these new polar intermetallic phases with a high d-block metal content.

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