We aim to determine fully the variation in charge order of synthetic Versiliaite and Apuanite samples by monitoring structural and magnetic order as a function of temperature, as well as examining the potential for a similar effect in Mg-substituted Apuanite; here the Fe-Mg interactions will be different to the mineral analogues and so will give insight into the dominant effects. We have also been able to synthesise other cation-substituted Apuanites and Versiliaites, eg where Co2+ repalces Fe2+. It is currently unknown whether charge or cation ordering will occur; NPD will be used to determine this effect, as well as examining the effect of substitution on magnetic order.