Synthesis and Structure of the Zintl-Phase K4Pb9 Containing Isolated Pb94- Clusters of Two Different Geometries

1998-03-03T00:00:00Z (GMT) by Virginie Queneau Slavi C. Sevov
The first nine-atom deltahedral clusters of lead in the solid state are found in the Zintl-phase K4Pb9. The compound crystallizes in the monoclinic space group P21/m, Z = 4, with a = 9.648(3) Å, b = 13.243(5) Å, c = 15.909(8) Å, and β = 103.24(4)°. The isolated Pb94- clusters are of two different geometries, a monocapped square antiprism and an elongated tricapped trigonal prism.