Distributions of absorber elements, Rb and Cd at Pos2.2 (lamella 2, see position also in Fig. 5c ), as deduced by STEMEDS. The maps are superimposed onto the corresponding STEMDF image, and the colour code refers to the atomic concentrations in at.%, ranging from the corresponding minimum (Min) to the maximum (Max) values. In addition, a combination of the Cd, Rb and Cu signals is shown (transparency of different colors scales with concentration, that is low concentration has high transparency and vice versa). The black dashed arrow in the STEMDF image indicates the position of an extracted EDS line scan, which is shown in detail in Supplementary Fig. 8 .
