Max-Planck-Inst. Festkoerperforsch., Stuttgart , D-70569, Germany

Na16Rb7Sb7 was obtained as brittle, silver colored shiny cuboctahedra with metallic luster from thermal reaction of the elements. It crystallizes in space group Fm.hivin.3m, Z = 4, Raniso = 0.044. It is a semiconductor with Eg = 0.33 eV; its calcd. band structure is discussed.
 

Angewandte Chemie, International Edition in English, 34 103-5, 1995.