“…Similar compositional tendencies are also revealed in the low-Q part of the reduced X-ray structure factor F(Q) = Q(S(Q)−1) for these glasses depicted in Figure 4 Thus, it is clearly seen that with increase in Se content in under-stoichiometric As x Se 100 − x (decrease in x parameter), the FSDP position shifts to higher scattering vectors Q 1 (Figures 2, 4, 5A), this effect for unmilled glasses being in an excellent agreement with known data. 30,31,38 The FSDP becomes merely reduced in a height and broadened in a width ΔQ 1 reaching a maximum near eutectic As 20 Se 80 composition, and then rapidly drops with Se content (Figures 2, 4, 5B), these changes agreed with our preliminary research. 11 Contrary to the FSDP, the PDP reveals an opposite steady tendency with x decrease in peak position Q 2 (decrease, Figure 8A) and width ΔQ 2 (increase, Figure 8B).…”