The radial distribution function (RDF) in Figure for metalmetal and metal-oxygen distances of all structures starting from the normal FiM structures (as presented in Section 4.2) are shown in Figure and. Figure A comparison of average bond lengths of each metal in octahedral and tetrahedral sites is shown in Figures and. In general, the trend of M-O bond lengths holds where Mn-O > Zn-O > Fe-O for both octahedral and tetrahedral sites. There are however some clear outliers for the average octahedral and tetrahedral bond lengths. These outliers have smaller average Mn-O octahedral and larger Fe-O tetrahedral bond lengths than the majority of Mn and Fe sites and make up 4.3 % of all structures sampled. To further investigate the origin of these outliers, the data was split into the majority of structures and the subset of outliers for subsequent analysis.