(color online) Coincident lattice site diagram of Σ9(114) GB in fcc crystal. Two different atomic radii do embody different {110} crystallographic planes. Orange balls are for upper grain, while blue for lower. Green spheres denote the coincident sites. Red solid line represents the unit structure of GB. Herein, T_1b denotes a transitional form of T_1a and T₂ refers to another type different from the former two. T_1a denotes original structure of Σ9(114) GB throughout the paper, which results from energy relaxation.