This data was measured with the Coherent X-ray Diffraction Imaging method (in small-angle geometry) at P10 beamline, PETRA III (DESY), during the beamtime P10-I-20190386 (beamtime ID 11007170). The sample is a mesocrystal of ~ 1.25 μm × 1.25 μm × 1.5 μm, constituted by gold nanocubes (~60 nm size). The mesocrystal was cut by FIB and glued onto a tomography tip. Two SEM measurements under different angles of the mesocrystal are provided: sample2-5_12.tif and sample2-5_17.tif The scan information, motors positions etc. can be obtained from the fio file. The sample was rotated stepwise in sprz (clockwise rotation in degrees around the vertical axis). 10 frames of 0.2s exposure each were measured at each angle, yeilding a total accumulated exposure of 2s per angle. The detector was an Eiger4M, positioned at 4.95 m from the sample (measured by ruler). The X-ray energy was 8.7 keV, the beam was focused to a spot of ~2.4 μm × 2.0 μm (HxV), no beam attenuation was used. The measurement was performed in air under liquid nitrogen cooling. The direct beam was masked on the detector using a beam stop (a Tungsten cylinder glued on a 100 μm-thick, 3 × 3 mm2 Silicon wafer itself glued on a 100 μm-thick, 5 × 5 mm2 Silicon wafer). scan command: e4mdscan sprz -5 185 380 10 0 0.2