The molecular structure of liquids is described with the help of the Pair-Distribution Function (PDF) and its Fourier transform, the structure factor S(Q). PDF and S(Q) measure the distribution of inter-ionic distances in the liquid. These functions can be predicted using molecular-dynamic (MD) simulations and measured using X-ray and neutron di↵raction. 12-15 Di↵raction measurements can be directly employed to test the results from MD simulations and thus validate the approximations underlying them. It is important to validate the accuracy of ab initio MD (AIMD) simulations especially in connection with powerful new methods utilizing fast-acting neural-network potentials (NNMD). The accuracy in NNMD potentials is intrinsically bounded by the training data collected from AIMD and therefore depends on details of interatomic potentials. Experimental measurements reported here provide validation of these predictions.