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.