Figure 8
Coordination (distances in Å) as functions of internal t1 and t2 coordinates for (Pb,Sb) atoms in the (PbySb1 − yS) Q subsystem. Shortest intra- and inter-layer (Pb,Sb)—S distances at (a) t1 = 0.75 where Sb > Pb and (b) t1 = 0.25 for Pb > Sb; (c) shortest (Pb,Sb)—S distance as a function of t1 and t2. |