Figure 7
Syntheses of difference electron density for the model of the fluorite-like structure Nd5Mo3O16 + δ doped with Pb (isolines are drawn in steps of 0.4 e Å−3) in (a) type I interstitial positions; (b) type II interstitial positions; (c) voids abutting MoO4 tetrahedra; (d) the vicinity of the additional O3 atom located in the void abutting the MoO4 tetrahedron. |