ABSTRACT
Applying X-ray diffraction, generally, only the near-surface crystallites contribute to the diffraction pattern. Under usual experimental conditions the Debye fringes are split for crystallite diameters of ≥100µm. By additional sample movements during the measurement, for example, translation, rotation and inclination, the number of reflecting crystallites can be increased, so that the condition of quasi-isotropic behaviour of the gauge volume may be fulfilled up to grain sizes of approximately ≥200µm. Using synchrotron radiation, however, separated Bragg reflections may already be observed at significantly smaller crystallite diameters due to the small divergence of the radiation.
