Study of the dislocations in large synthesized diamond crystal with synchrotron radiation

Crystal defects in large synthesized diamond grain were studied with X-ray topography using white synchrotron radiation. Several bundles of straight stretching dislocations were observed in the specimen. The direction indices of these dislocations in the crystal were calculated. The five dislocation bundles are parallel with and directions, respectively. The Burgers vectors of the dislocations were analyzed. Each bundle of the dislocation was composed of many dislocations with different Burgers vectors. A bundle of dislocations parallel with direction were found in the crystal that has never been observed in the natural diamond before. The complexity of the Burgers vector and the presence of the metastable dislocations in the specimen were discussed.