743.    ---------------.  [DRAIN, J., AND MICHEL, A.]  [Thermomagnetic and Structural Study of the Cobalt Carbide Co2C.]  Bull. Soc. Chim., January-February 1951, p. 23.

     Reduced Co, supported on ThO2, was carburized with CO at 210° C. to form paramagnetic, orthohombic Co2C (abs. 1440) similar to Co2N, with a=2.904Å, b=4.465Å, c=4.368Å.  the crystalline parameters varied slightly with the mode of preparation, probably because of differences in composition.  The carbide decomposed in vacuo at about 260° into a ferromagnetic hexagonal close-packed solid solution of C in a-Co, which was subsequently decarburized to hexagonal close-packed a-Co.  Reaction set in at 298° in N2, at 198° in H2, and at 364° in CO.