The effect of heat treatment upon the mobility of dislocations was investigated in crystals which were doped with high-solubility (Ca2+) or low-solubility (Pb2+) impurities. The results which were obtained following aging and heat treatment indicated that the type of impurity, and its state (degree of aggregation, etc.) in the crystal, had a marked effect upon the relative mobilities of edge and screw dislocations, and also upon the parameters of double transverse slip.

The Influence of Thermal Processing on the Relative Mobility of Edge and Screw Dislocations in NaCl Crystals. R.P.Zhitaru, N.A.Palistrant: Physics of the Solid State, 1999, 41[6], 947-9