Figure 3
(a) Histogram H(Q), equation (5), of theoretical structure factors for the NSH crystal with isotropic r.m.s. displacement of 0.1 Å in all atomic sites. (b) Variations in H(Q) induced either by 12% of substitutional doping (top curve) or by 0.25 Å of r.m.s. displacement in O2− ions along the c axis only (bottom curve). Curves are shifted in the vertical axis for the sake of clarity. Vertical scales are relative to the maximum value of H(Q). |