2370.     NATANSON, G. L.  [Genesis of Iron Catalysts for the Synthesis of Ammonia.]  Jour. Chem. Ind. (U.S.S.R.), vol. 13, 1936, pp. 401-405; Chem. bs., vol. 30, 1936, p. 4630.

        Most important point in the preparation of NH₃ catalysts is the formation of a solid solution of the promoter in the catalyst, since in this case smaller crystals are formed and a more-porous product is obtained.