A visual representation of these dynamic exchanges is well rendered by the use of chord diagrams of Figure , where the size of the arc sections is proportional to the population of the various AE, while the width of the chords corresponds to the intensity of atomic exchanges between them. At 673K, these analyses show high communication and dynamic exchange in the NP. This does not pertain to surface AEs only but this atomic exchange can also be observed between the innermost NP bulk (b) and the least coordinated surface AEs, e.g. vertexes AEs (v and v ′ ), or between sub-surface and surface AEs (ss→v and ss→e'). On the other hand, at 300K, dynamic exchanges are predominantly observed among AEs with similar coordination numbers, such as v→v', b→ss, indicating limited atomic mobility and constrained transitions. Despite the striking internal atomic dynamics observed at 673 K, in such conditions, the NP still preserves its truncated octahedral structure (Figure ); it is interesting to note that these analyses performed on the MD trajectories starting from the experimental configurations captured at 0 s, 0.6 s,...,6.0 s provide very similar results (Figure -c left-to-right). This demonstrates that these MD provide reliable pictures of the internal atomic dynamics present in these NPs in equilibrium regimes and in experimental relevant conditions. Furthermore, this also allows us to concatenate all data in a unique dataset, useful to improve the statistical confidence of our analysis.