These partial PDFs reveal the atomic pairs that produce the peaks measured with experiments such as the main peak at 1.56 Å being the result of Be-F correlations. The first nearest-neighbor peak locations and coordination numbers (CN) are included in Table . The neutron and X-ray experimental nearest-neighbor distances in Table are smaller than those found through simulations except for Li-F, and the experimental PDF results are at smaller distances compared with the simulated results.