3019.     SANBOUGI, K.  Reduction Equilibria of Iron Oxides.  I.  Measurements of the Equilibria of Reaction.  Sci. Repts. Tohôku Imp. Univ., ser. A. vol. 1, 1949, pp. 213-222; Chem. Abs., vol. 45, 1951, p. 6020.

        Equilibria equations were derived for the following reactions:  Fe₃O₄ (in wüstite)+CO=3 FeO (in wüstite)+CO₂; Fe₃O₄ (in wüstite)+H₂=3 FeO (in wüstite)+H₂O; Fe₃O₄ (in wüstite)=3 FeO (in wüstite)+FeO and Fe₃O₄ in wüstite at several O₂ concentrations and temperatures.  Other thermodynamic calculations were made for the various equilibria in wüstite.