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Figure 8
Three-dimensional holographic reconstruction of Cu[_3]Au obtained after symmetrization (fourfold rotational symmetry and the mirror symmetry). Black dots are plotted at the positions where the reconstructed atomic image intensity [|\psi({\bf r})|^2] is larger than 50% of the maximum intensity. Cubes have a side length of the actual lattice constant a = 3.75 Å. They are drawn in order to indicate the actual positions of atoms. The centre of the figure is the position of a fluorescing Cu atom. The images of the next-nearest neighbours of a fluorescing Cu atom peak at 3.4 Å from the centre. The nearest neighbours are weaker in intensity and not visible.

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