  A coherent x-ray diffraction experiment was performed on an isolated
colloidal crystal grain at the coherence beamline P10 at PETRA III. Using
azimuthal rotation scans the three-dimensional (3D) scattered intensity in
reciprocal space from the sample was measured. It includes several Bragg peaks
as well as the coherent interference around these peaks. The analysis of the
scattered intensity reveals the presence of a plane defect in a single grain of
the colloidal sample. We confirm these findings by model simulations. In these
simulations we also analyze the experimental conditions to phase 3D diffraction
pattern from a single colloidal grain. This approach has the potential to
produce a high resolution image of the sample revealing its inner structure,
with possible structural defects.
