An interesting observation is that due to the change in magnetic symmetry, the normal spinel configuration no longer has only one unique magnetic structure for any of the mixed composition spinels (i.e. excluding MnFe 2 O 4 and ZnFe 2 O 4 ). This is due to the two unique layers of tetrahedral sites that can either be between FM aligned octahedral layers or AFM aligned octahedral layers (see Figure ). As mixing of the two end members reaches an equimolar mix of Mn and Zn, many unique normal structures are possible. When the magnetic structure is changed to the FiM structure, these unique structures collapse to the same equivalent structure. This is most clearly observed in Figure where multiple different normal spinels are observed for N Zn = 2 -5. An extensive discussion of magnetism in spinels is presented by Tsurkan and coworkers.