Abstract
Equilibrium configurations of threefold composite dislocations that include either intrinsic-intrinsic or intrinsic-extrinsic stacking faults are calculated in the framework of isotropic elastic theory. A comparison between the theoretical predictions and the experimental observations of Lomer-Cottrell dislocations in the intermetallic alloy Ni3 Ga suggests that some of the observed configurations are not at equilibrium.
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