832.    EMMETT, P. H., AND LOVE, K. S.  Reduction by Hydrogen and Thermal Decomposition of Nitrides Made by the Reaction of Ammonia With Various Promoted and Unpromoted Iron-Synthetic-Ammonia Catalysts.  Jour. Am. Chem. Soc., vol. 55, 1933, pp. 4043-4050; Chem. Abs., vol. 28, 1934, p. 29.

      Fe₄N prepared from active catalysts decomposes more rapidly than that prepared from rather inactive catalysts.  The energy of activation of the decomposition is about 50,000 cal.  Gives rates and nature of the reduction and decomposition of the nitrides from the various Fe catalysts.