Remarks: It is very important to offer new opportunities to the Spanish Scientific Community to develop current and new ideas. This must be done not only to improve basic scientific knowledge, but mainly to get a better understanding of every day industrial, environmental and health problems that will help to develop solutions in these areas.

 

 

 

  • High precision powder crystallography.

    The high resolution data will allow to study the structures of interesting compounds such us drugs and pharmaceutical compounds, superconducting samples, alloys, catalysts, zeolites, ionic conductors, magnetic materials, etc. Many industrially and technologically important materials are not single phases, and in this diffractometer it will also be possible to carry out the phase analysis of these mixtures and eventually to study the structures of some phases. There is always a compromise between resolution and intensity and, below an approximated instrumental resolution limit (Dd/d ~ 0.04 %) sample broadening is so important that more resolution does not help very much to the structural investigation. There is state-of-the-art software that allows combined structural studies using several powder data sets which results in a very detailed structural picture

  • Resonant diffraction.

    Resonant diffraction, based on the anomalous dispersion, is a technique that provides new information making possible site and chemical selective diffraction enhancement. High resolution resonant diffraction will allow to understand the cation and oxidation states distribution in complex materials, generally of high industrial interest, such us electro-optic materials or superconductors.

  • Real crystals:

    defects, microparticles and microstrains. Because the instrumental broadening will be very small, it will be possible to study the line broadening due to the material either from fabrication or use. Then, the technological implications will be analysed to understand, and if possible to improve, the properties of the studied materials. Thermal and mechanical treatments of super-alloys is a good example where the microstructural characteristics play a key role that governs the practical applications.

  • Studies of phase transitions and transformations.

    Structural phase transitions in solids is one of the most exciting areas of condensed matter. The very high resolution will allow to measure even very subtle distortions making possible to analyse the order parameter(s) as a function of temperature, chemical gradients, and eventually pressure. Melting and crystallization processes of a very wide range of materials such as polymers or advanced alloys will be analysed. Thermal expansion characterization will also be undertaken.

  • Time-dependent phenomena: in situ powder synchrotron diffraction.

    Time resolved experiments allow to follow chemical reaction. It is vital to identify the phases in transient solid state chemical reactions and to characterize structurally crystalline materials under relevant industrial conditions if improvements in chemical processes have to be carried out. New bidimensional detectors will allow to access to short time scales. Transition Metal and Rare Earth Mixed Oxides High Tc superconductors and related materials Giant Magneto-Resistance materials Ionic conductors, solid electrolytes.

 

  • Other:Composite and technological materials (catalysts, zeolites, cement/concrete...), Molecular solids, Coordination and organo-metallic chemistry, Modulated structures and aperiodic materials (quasicrystals...), Diluted magnetic semiconductors