Structural and electronic properties of neutral clusters In12X (XÂ =Â C, Si, Ge, and Sn) and their anions from first principles

Geometric optimizations demonstrate that the ground state geometries of In12X (X = Si, Ge, Sn) and their anions favor the pseudo D5h structures, while those of In12X (X = C) and its anion tend to be Cs ones. Magnetism analysis indicates that indium behaves as a trivalent atom in the clusters.