LAUE AND KOSSEL DIFFRACTION ON QUASI-CRYSTALS BY MEANS OF SYNCHROTRON-RADIATION

Laue experiments using synchrotron radiation have been carried out on quasicrystalline samples mainly with decagonal symmetry. Apart from La ue spots, Kossel lines and diffuse scattering have been observed on th e X-ray film simultaneously. High spatial resolution was achieved by t he positioning of the X-ray film at a distance of about 350 mm from th e sample. Conclusions about the real structure and the crystal quality could be drawn using information obtained from the appearance of the Kossel lines, and the shape and the splitting of the Laue spots, respe ctively. The dimensions of the mosaic blocks and their tilting behavio ur for one of the samples under investigation have been determined.