Figure 3
Difference-Fourier maps of the residual electron-density distribution in the neighborhood of the split copper site (model 3) for layers (a) (x1, x4), (b) (x2, x4) and (c) (x3, x4). Refined atomic coordinates are marked by solid lines. Lines indicate Cu and Cu′ with an occupancy above 50%. Contour intervals are 0.1 e Å−3. |