DISLOCATION REACTIONS IN CZOCHRALSKI-GROWN SALOL CRYSTALS

Large single crystals of salol were grown in various crystallographic directions by the Czochralski technique. Their growth defects were stu died by X-ray topography. The typical arrangement of grown-in dislocat ions is described. In some cases crossing growth dislocations interact and form dislocation nodes. It is confirmed, that the Burgers vectors b of the dislocations merging into the nodes obey Frank's theorem SIG MA b = 0. The dislocation reactions proceed in such a way that the ene rgy of the system is reduced.