Growth defects in barium‐strontium niobate crystals

The paper is concerned with the results of investigation of barium‐strontium niobate chemical composition change, of the lattice parameter, microhardness of the crystal region. Analysis reveals the increase of the barium content up to 4% and the change of the crystal lattice parameter by 10 −3 Å, leading to considerable tensions and crystal cracking. The etching of the slides perpendicular to the growth axis has been realized as well as the decoration of the fresh cleavages by anthraquinone vapours which indicate the electric inhomogenity in the crystal volume.