The intrinsic stacking fault energy of diamond was calculated using the pseudopotential method to a second-order perturbation approximation. The value was questionable because of a possibly poor convergence of the method, and was very large: 1860mJ/m2.

Pseudopotential Calculation of the Stacking Fault Energy in Diamond, Germanium, and Grey Tin. L.J.Chen, L.M.Falicov: Philosophical Magazine, 29[5], 1133-6