Fig. 2: Comparison between ND/HEXRD data and the RMC-MD model for the alkali silicate glasses in Q space.
a Neutron total structure factor SN(Q) and b X-ray total structure factor SX(Q). Black solid curve, experimental data; colored curve, RMC-MD model. Averaged experimental SN,X(Q) for the Na50K50 glass calculated using the Na100 glass and K100 glass data are plotted as a dashed black curve. The RMC-MD and experimental data are practically indistinguishable. The SN,X(Q) for the Na50K50 glass is roughly identical to the average of those for the Na100 and K100 glasses. It is worth mentioning that both the FSDP and PP are visible in the neutron structure factors, S(Q), while X-ray S(Q) exhibits only the FSDP, because PP is largely taken by the oxygen-related correlation, which can be easily detected by neutrons.
