Schafarzikite minerals are structurally interesting in having 1-D chains of edge-linked transition metal octahedra. This experiment aims to determine the cause of the ferromagnetic response in MnSb2O4-like samples by studying the structural and magnetic properties at a range of temperatures. This will hopefully also provide an explanation for the variation in properties previously reported.We also intend to engage in a preliminary study of CuAs2O4 in order to determine the magnetic structure of this previously reported yet uncharacterised material. If successful, this will be developed into a full study of the properties of CuAs2O4, including the effect of doping to introduce mixed copper oxidation states within low-dimensional chains.