Check out the recent NJC Perspective article by Andreas Schnepf (University of Karlsruhe) on metalloid cluster compounds of germanium.
In this review, the author presents a novel class of cluster compounds in group 14 chemistry, shedding light on the synthesis, structural features and bonding properties of these structures in the borderland between the molecular and solid state.
Metalloid cluster compounds of germanium: novel structural motives on the way to elemental germanium! Andreas Schnepf, New J. Chem., 2010, DOI: 10.1039/C0NJ00263A
