Using the weak-beam method of transmission electron microscopy, it was shown here for the first time that the superlattice dislocation in this L12-type alloy could be resolved, following its fourfold dissociation. That is, the ½[¯101] superpartial pairs which bounded the antiphase boundary dissociated further into Shockley partials according to:

[¯101]  1/6[¯1¯12] + CSF + 1/6[¯211] + APB + 1/6[¯1¯12] + CSF + 1/6[¯211]

where CSF was a complex stacking fault and APB was an antiphase boundary.

Weak-Beam Observation on Shockley Partials in a Ni3(Al,Ti) Single Crystal. Y.Liu, T.Takasugi, O.Izumi, H.Ohta: Philosophical Magazine Letters, 1988, 58[2], 81-5