Dissociation of a dislocation into two particals in an FCC metal is given by the following equation.
$$\frac{a}{2}\left[ {1\overline 1 1} \right] \to \frac{a}{6}\left[ {2\overline 1 1} \right] + \frac{a}{6}\left[ {1\overline 2 \overline 1 } \right]$$
On which plane do these two partial dislocations lie?