Self-organization of mesoscopic BN blocks irradiated by nanosecond ion beams

Using roentgen diffraction and electron microscopy, the influence of nanosecond irradiation by ion beams of high energy on forming of self-organized mesoscopic (SM) blocks in near surface´s layers of BN has been studied. It was shown that low temperature transitions from hexagonal to wurtzite boron nitrides is associated with changes of shape and sizes of self-organized particles consisting the SM- blocks. We have calculated the parameters of SM- blocks using the meanings of interplane distances and properties of subreflexes orders. The collective shifting deformations of layers in SM- blocks provides phase transition under the screen and forming the set of nanotubes with escaping of five order axes of symmetry. It has been realized that pentagons and stars arranged in points of entrance of five order axis of symmetry are associated with peculiarity of self-organization of the spiral-cyclic structures.