Figure 12
Energy variation of the simulated intensities (lines) and corresponding experiment (circles) of the () reflection in the thin film B. The three simulated curves result from the P2/c model of displacements (a) without any charge disproportion (solid red line), (b) with charge disproportions on the octahedral B3–B4 (0.2 e−) atoms included (dotted green line) and (c) with the charge disproportion on the octahedral B3–B4 atoms reduced to half this value (dashed blue line). |