The gradient elasticity analytical solution for the dislocation energy can eliminate the core region singularities of elasticity theory. Such an approach is employed here in connection to previous empirical potential calculations of 1/6 <20-23> partial dislocations delineating the I1 intrinsic basal stacking fault in wurtzite GaN. Twelve stable configurations obtained for each of the two GaN polarities, their core radii, and their energies are considered. The gradient coefficients and the dislocations’ parameters are evaluated and compared with those obtained with elasticity calculations. The gradient solution is found to interpret accurately the dislocation energies calculated by the empirical potential within the core region.

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