Remarks: This experimental station will be concentrated on diffraction from single crystals, particularly in the area of Materials Science. The extremely high flux, even at high energies (35 keV), makes it suitable for time-resolved diffraction, diffraction from microcrystals, and for diffraction from crystals in absorbing sample chambers such as furnaces, high-pressure cells or cryostats. The wavelength is tunable in the energy range 5-35 keV with an energy resolution close to DE/E=10-4, making it suitable for the use of anomalous dispersion around X-ray absorption edges. The Spanish single crystal diffraction groups are very interested in doing single crystal data collections, using the "new" Spanish beamline at the ESRF, since it is possible.

 

  • Crystal structure determination of very small single crystals.
  • Sets of very high resolution data collection.
  • Resonant X-ray diffraction.
  • Phase transitions.
  • Other.Besides the lines indicated above, some groups would be interested in doing resonant magnetic scattering experiments and other groups would like to have the possibility of collecting data under a polarizing electric field.

 

Almost all groups would like to work with high quality crystal but it is impossible to grow them without defects, twins, etc.. Very often only small crystals are available. These groups work in the fields of Materials Science, Chemistry and Mineralogy. They prepare and study, zeolites, oxides, organic and organometallic compounds where the crystal size is not suitable for standard sources.

There are some groups interested in electron density studies, especially in organometallic compounds with nano-acceptor ligands with carbon-carbon multiple-bonds. In general, the diffraction data would be collected at low temperature.

Several groups are interested in the use of anomalous dispersion to solve the structure of chiral molecules of light elements. Single crystal data around the metal absorption edge in 3d-metal-zeolites and aluminophosphates, mixed valence oxides(5), organic-inorganic 1D-systems and minerals. This method also would be applied to the study of the role of some cations and template molecules inside the cages and tunnels in microporous substances.

Some groups are interested in this field. For example, the study systems like ammonium-perovskite where the different ammonium-framework interaction possibilities give a rich pressure-temperature phase diagrams.