Fe-O

The Fe-O system is well known experimentally and has a number of characteristic features in both liquid and solid phases—for example extended solubility of the solid oxides, magnetic transitions, and a liquid miscibility gap. The Fe-O system is interesting since Fe can be both ferrous (+2) or ferric (+3), as shown in this example using the TCS Metal Oxide Solutions Database (TCOX).

Calculated Fe-O phase diagram.

Figure 1: Calculated Fe-O phase diagram [1991Sun].

Reference

[1991Sun] B. Sundman, An assessment of the Fe-O system. J. Phase Equilibria. 12, 127–140 (1991).