MICRODIFFRACTION ON Be SINGLE CRYSTALS WITH SYNCHROTRON RADIATION. S. Fiedler, A. Bram, C. Riekel¹ and M. Burghammer². ¹European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France, ²Institut f. Kristallographie, Theresienstr. 41, 80333 Muenchen, Germany.

The microdiffractometer installed on the Microfocus beamline at the European Synchrotron Radiation Facility has been used to study single crystals of Be as a function of crystal volume in order to derive accurate structure factors. Crystals of conical shape have been produced by chemical etching techniques. The smallest tips obtained had diameters between 1-2 micrometer. Crystal volumes down to a few cubic micrometer have been examined by monochromatic radiation ([[lambda]]=0.0687nm) which corresponds to a minimum scattering power of S=8*10¹¹ (defined as in [1]). Datasets with a resolution down to 0.04nm have been collected with an online area detector. Background scattering had to be reduced as far as possible by using microcollimators in combination with a focused beam. Results of the refinement of the extinction and the temperature factor will be reported.

W. Rieck, H. Euler, H. Schulz; Acta Cryst., A44, 1099, (1988)