Figure 1
Δρ maps for Al6Ti2O13, with positive and negative contours as solid and dotted lines, respectively, at increments of 0.4 e Å−3 [σ(Δρ) = 0.20 e Å−3]. The zero contours are dashed and the numbers indicate the distance of the atomic position from the viewed plane. (a) The slightly chaotic residual electron density in the mirror plane as centred on M2, compared with (b), which is also centred on M2. |