Na 2.8 Cu 5 Sn 5.6 : A Crystalline Alloy Featuring Intermetalloid ${{}_\infty ^{\bf{1}} \left\{ {{\bf{Sn}}_{{\bf{0}}{\bf{.6}}} {\bf{@Cu}}_{\bf{5}} {\bf{@Sn}}_{\bf{5}} } \right\}}$ Double‐Walled Nanorods with Pseudo‐Five‐Fold Symmetry

Not quasi‐crystalline : Approximate five‐fold symmetry appears in bronze‐type Cu–Sn rods that are separated by Na atoms in Na 2.8 Cu 5 Sn 5.6 (see picture). The rods are compared to the [Sn@Cu 12 @Sn 20 ] 12− cluster in the recently characterized A 12 Cu 12 Sn 21 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.