Figure 5: Fe versus Mg in akimotoite.

Mg contents (in a.p.f.u., atoms per formula unit) plotted against the Fe contents (in a.p.f.u) for akimotoites. Filled circles correspond to hemleyite, empty circles refer to literature data^{8,32,33,35,42,43,44,45,46,47,48,49}. The dashed line indicates the 50%-limit.