Na2.8Cu5Sn5.6: A crystalline alloy featuring intermetalloid (1)(∞){Sn(0.6@Cu(5)@Sn(5)} 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). 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.
Department of Chemistry, Technische Universität München, Garching, Germany.
Saskia
S
Stegmaier
Thomas F
TF
Fässler