unslipped ppe unfaulted (faulted) zones b 2 2] [211 Two parallel shockley partial dislocations separated by a faulted zone constitute an extended dislocationunslipped unfaulted slipped (faulted) zones [121] 6 1 [211] 6 1 I II III 1 b 2 b Two parallel shockley partial dislocations separated by a faulted zone constitute an extended dislocation