MD simulations starting from NP structures taken every 0.6 s along a multi-second experimental data acquisition show consistent and conserved atomic dynamics within the NP. This is true both at 673 K (same temperature as during the data acquisition) and at 300 K (see Figure , Figure and Figure ). Despite the atomic dynamics seen in these NP simulations being pronounced, especially at 673 K of temperature, the NP is not seen to deviate much from the starting configuration in terms of global structural features. These results thus demonstrate that the NP is stable in its octahedral shape in these experimental conditions and that the atomic dynamics seen in the simulations are consistent with the equilibrium one that can be expected in such realistic regimes. This means that such an approach allows us to reconstruct in a reliable -notably, with a spatial resolution of the Å, and the time resolution of the picosecond -way the structural dynamics that such metal NPs have when observed along an experimentally-relevant seconds time-window.