Stacking fault formation due to the presence of liquid inclusions in barium nitrate crystals

Abstract

Liquid inclusions on the cubic and octahedral faces of barium nitrate crystals show different formation mechanisms. Using X-ray diffraction topographs, we have established that the defects which appear on the inclusions in octahedral sectors are of two kinds: dislocations having large size Burgers vectors formed by the association of several coplanar 〈110〉 vectors and stacking faults created by the glide of a {111} plane, when the macrosteps which border the inclusion are parallel to the three other {111} planes. The nature of the glide vectors have been analysed and interpreted in terms of the atomic structure. The images on the section and traverse topographs have been compared.