1057.    ---------------.  [FORRESTIER, H., AND KIEHL, J. P.] [Effect of Adsorbed Gases on the Rate of Reaction Between Metallic Oxides.]  Jour. Chem. Phys., vol. 27, 1950, pp. 165-173; Chem. Abs., vol. 44, 1950, p. 7128.

        The rate of formation of ferrite from Fe₂O₃ and NiO increases logarithmically with the partial pressure of H₂O present over the pressure range of 10^-5 –760 mm. at 500°-700°.  Extrapolation indicates 0 reaction rate at 10^-5 mm.  The order of decreasing efficiency of gases in speeding up the reaction in the temperature range 600°-700° is H₂O, CO₂, A and O₂, air, N₂, Ne, and He.