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Imperfections in the (100), (010) and (001) plates of an inorganic nonlinear crystal of lithium boric oxide [lithium triboron (III) tetraoxide] (LiB3O5), prepared from different blocks, have been studied by means of X-ray projection topography. The experimental results show that there are mainly grown-in dislocations with b = [100], [101], [10
], [001] and [011], glide dislocations in the system of (010)[101], inclusion-induced dislocations almost all with b = [101], [10] and [001], distributed in a network parallel to the (010) plane, inclusions with the orthorhombic configuration and a long stripe to which there is only one gas bubble attached, and assigned to be the negative crystals. All dislocations run nearly straight and are of the pure screw type. The origins of defect formation and some other crystal properties are discussed in terms of the structure.
], [001] and [011], glide dislocations in the system of (010)[101], inclusion-induced dislocations almost all with b = [101], [10] and [001], distributed in a network parallel to the (010) plane, inclusions with the orthorhombic configuration and a long stripe to which there is only one gas bubble attached, and assigned to be the negative crystals. All dislocations run nearly straight and are of the pure screw type. The origins of defect formation and some other crystal properties are discussed in terms of the structure.
