3680.     WHITE, J.  Equilibrium at High Temperatures in Systems Containing Iron Oxides.  Iron and Steel Inst. (London), Carnegie Schol. Mem., vol. 27, 1938, pp. 1-75; Chem. Abs., vol. 33, 1939, p. 4496.

        Dissociation of Fe₂O₃ into O₂ and other Fe oxides was studied up to 1,650° under O₂ pressures 2-76 mm. Hg.  The reaction was followed by measuring the change in O₂ pressure in a sealed tube, by air quenching from the equilibrium temperature and determining the weight loss, or by measuring the weight change with a special balance while the sample was at high temperature.  Dissociation increases with rising temperature and decreasing O₂ pressure.  Addition of lime increases dissociation and addition of silica decreases it.  In mixtures each acts independently of the other.  Equilibrium constants were calculated and dissociation calculated from them was found to be in approximate agreement with the observed dissociation.  Additional work was done on the mutual solid solubility of Fe₂O₃ and Fe₃O₄.  23 refs.

        WHITE, R. R.  See abs. 13, 258.

        WHITE, T. A.  See abs. 199, 200.