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Side view of a HPHT diamond with unusual cone-like defects and the high magnification image of the defect.

This article describes complete characterization of the polygonal dislocation half‐loops (PDHLs) introduced by scratching and subsequent bending of an Si(111) crystal. The study is based on the X‐ray topo‐tomography technique using both a conventional laboratory setup and the high‐resolution X‐ray image‐detecting systems at the synchrotron facilities at KIT (Germany) and ESRF (France). Numerical analysis of PDHL images is performed using the Takagi–Taupin equations and the simultaneous algebraic reconstruction technique (SART) tomographic algorithm.