A new class of mesostructured metal germanium sulfide materials has been prepared and characterized. The synthesis, via supramolecular assembly of well-defined germanium sulfide anionic cluster precursors and transition-metal cations in formamide, represents a new strategy for the formation of this class of solids. A variety of techniques were employed to examine the structure and composition of the materials. Structurally, the material is best described as a periodic mesostructured metal sulfide-based coordination framework akin to periodic hexagonal mesoporous silica, MCM-41. At the molecular scale, the materials strongly resemble microstructured metal germanium sulfides, in which the structure of the [Ge 4 S 10 ] 4-cluster building-blocks are intact and linked via µ-S-M-S bonds. Evidence for a metal-metal bond in mesostructured Cu/Ge 4 S 10 is also provided.

Cells and ElectricalConduction of Pure and Doped A120J," J . .4m. Ceram. Soc., 54 [9] 444-5 I ( I 97 I ) .

Das Titelsystem weist ein einziges Eutektikum bei 73 mol‐% PbO und 635°C auf.