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SFB 408:  Inorganic Solids without Translational Symmetry - Snthesis, Structure and Modelling

Subject Area Chemistry
Term from 1995 to 2004
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5480115
 
Condensed matter can exist in a broad variety of states of order, from crystallinity to the amorphous state. Diffraction methods led to a high level of knowledge on the crystalline state. In contrast to this, information about the detailed structure of amorphous solids beyond the arrangement of the nearest neighbours has been very scanty. But for a reliable analysis and understanding of the chemical and physical properties of amorphous materials such information is essential. Thus, the goal of this collaborative research centre is the investigation of the local and medium range structure of inorganic materials without translational symmetry. An essential ingredient is the joint effort of experimental and theoretical groups that synthesize, analyse and model specially selected materials, the close interaction allowing for constant feedback leading to a better understanding of the investigated compounds. In this research centre scientific groups of the institutes for Inorganic Chemistry, Physical and Theoretical Chemistry, Mineralogy, Applied Mathematics, and Physics of the University of Bonn, the Fraunhofer Gesellschaft and the University of Applied Sciences in Rheinbach collaborate. The research program is divided into three parts: (A) The synthesis of suitable materials (oxidic silicate glasses, amorphous nanoporous alumo silicates, tellurium halide glasses, non-crystalline networks based on carbon sulphides and oxides, phosphorous, silicon, and aluminium nitrides, glassy transition metal phosphates). (B) The application of a variety of analytical methods sensitive to structure such as spectroscopic, imaging and diffraction methods, and (C) the modeling by the development of models for the structures of materials which are prepared and analysed by research areas A and B.
DFG Programme Collaborative Research Centres

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