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Abstract
Some recent developments in the dislocation theory of plastic deformation in ionic crystals are reviewed. It has been found that the Peierls force operates on slip planes of type {110} and {00l}, that interactions between dislocations and point defects are different on these planes, that point defects are produced by jogged dislocations, and that cross-slip is responsible for polycrystalline ductility. There are still many interesting questions to be answered in the field of ionic crystals, which provides an excellent testing ground for dislocation theory.
MST/268