Figure 7
Coordination of the Ca2 site (blue) in Ca4Fe2Mn0.5Ti0.5O9. (a) Average structure: the split-site O5 can be seen at the top. (b) Local structure: only one position of O5 exists, corresponding to one tetrahedral chain configuration. O3 atoms of the same tetrahedral chain are shifted to the left, the O3 belonging to the neighbouring chain, and Ca2 atoms are shifted to the right. This figure is in colour in the electronic version of this paper. |