1. The stresses caused by an edge dislocation are complex due to its inherent asymmetry. 2. Edge dislocations form so called tilt walls, while screw dislocations form twist walls.3. Slip occurs by dislocation glide of either screw or edge dislocations within a slip plane. 4. Edge dislocations form the edge of an extra layer of atoms inside the crystal lattice.5. Edge dislocations are caused by the termination of a plane of atoms in the middle of a crystal.6. There are two types of dislocations in crystals that can induce slip-edge dislocations and screw dislocations. 7. A pure edge dislocation is shown at the island interface to illustrate the relieved structure of the cluster. 8. In the case of an edge dislocation , a half plane of atoms is wedged between two planes of atoms. 9. Another crude analogy : Think of a crystal with line defects ( edge dislocations and screw dislocations but not disclinations ). 10. Where the orientation of the dislocation line changes, a screw dislocation can continue as an edge dislocation and vice versa. 
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