Extended Data Figure 5: Lattice analysis of the measured 3D atomic model.
From: Deciphering chemical order/disorder and material properties at the single-atom level
a–d, Four fcc sub-lattices for the atomic sites of the FePt nanoparticle (Fe, red; Pt, blue). Two of the four sub-lattices in the two large L12 grains swap Fe for Pt atoms and vice versa (a, b), while the other two sub-lattices share the same sites of Pt atoms (c, d). The vertical [001] direction is exaggerated to separate the planes. Approximately 3.4% of the atomic sites (open squares) located on the two surfaces of the nanoparticle along the missing wedge (horizontal) direction were removed from the analysis because their location deviated slightly from the fcc lattice (‘non-fcc’).
