The real structure of single crystals was investigated using transmission electron microscopy (thin foil) and diffraction methods. Two structural defects were found: flat segregations, and dislocations with a Burgers vector of <100>. Most of the dislocations were arranged on {100} planes, which could be glide planes for a simple cubic structure. However, the dislocation loop configuration showed that, during single-crystal growth, their movement was not characterized by glide but by diffusion creep. It was shown that the main source of dislocations arising during the growth of single crystals was generation by segregation.

Features of the Real Structure of Lanthanum Hexaboride Single Crystals. Paderno, V., Paderno, Y., Britun, V.: Journal of Alloys and Compounds, 1995, 219[1-2], 228-31