.

Fig. 4.. (a) Six possible atomic arrangement direction ${{\overset{\scriptscriptstyle\rightharpoonup}{h}}_{i}}$ of a half of excess atomic plane of edge dislocation in 2D triangle lattice plane; (b) Six possible direction of Burgers vector ${{\overset{\scriptscriptstyle\rightharpoonup}{b}}_{i}}$ of edge dislocation corresponding to the atomic arrangement direction${{\overset{\scriptscriptstyle\rightharpoonup}{h}}_{i}}$. (c) Six possible directions of the composite vector B_i=b_i+b_i+1 and the directions of b_i. The solid line arrow corresponds to B_i vectors, while the dotted short arrow corresponds to b_i vectors. The direction of the B_i is rotated by 30° with respect to the direction of b_i. The number in the Fig. 4(c) correspond to the order i in b_i and B_i.