2254.     MEYER, W. F.  [Investigations of Cobalt and the System Cobalt-Carbon.]  Ztschr. Krist., vol. 97, 1937, pp. 145-169; Chem. Abs., vol. 31, 1937, p. 8339.

        X-ray photographs at temperatures up to 1,100° show no 2d transformation of Co.  On heating with illuminating gas up to 230°-270° a mixed crystal of variable composition is formed, which is unstable at room temperature.  At 500°-800° stable Co₃C is formed, analogous to Fe₃C.  Its unit cell dimensions are a=4.52, b=5.08, c=6.73 Å.  Heating with benine and CO also produces Co₃C.