Germanium and Silicon Disulfides: Structure and Synthesis.

Crystal structures of the tetragonal forms of germanium and silicon disulfide are similar and consist of (SiS(4))(4-) and (GeS(4))(4-) tetrahedra which share vertices to form three-dimensional networks. These tetragonal materials, synthesized at high pressure and temperature, are different from the previously known germanium and silicon disulfides.