For a benchmark to compare our substitution scheme against, each composition along the ZnFe 2 O 4 -MnFe 2 O 4 phase line was run with a pure swapping ChemDASH run (a total of 9 runs Zn x Mn 8-x Fe 16 O 32 with x = 0 -8 at integer intervals). The results are summarised in Figure .