Partial structures of [(a), (b), (c)] ELF and [(d), (e), (f)] charge density of S_sub in diamond in 512-atom supercell with C 2 v symmetry. 2D ELF contour plots of the plane crossing (b) S, C₃, and C₄ atoms, and (c) S, C₁, and C₂ atoms. 2D charge density contour plots of the plane crossing (e) S, C₃, and C₄ atoms, and (f) S, C₁, and C₂ atoms. The brown balls are C atom, and red is S atom. Blue to red indicates the gradually increased charge localization.