Imperfections in (100), (010) and (001) plates of the inorganic non-linear crystal, prepared from different blocks, were studied by means of X-ray projection topography. The results showed that there were mainly grown-in dislocations with b = [100], [101], [101¯], [001] and [011], glide dislocations in the (010)[101] system, inclusion-induced dislocations; almost all with b = [101], [101¯] and [001], distributed in a network that was parallel to the (010) plane, and inclusions with an orthorhombic configuration. All of the dislocations ran almost straight and were of pure screw type.

Q.L.Zhao, Y.S.Huang, D.Y.Tang, A.D.Jiang, W.Z.Zhong, S.K.Hua: Journal of Applied Crystallography, 1995, 28[3], 294-301