3667.     WESTGREN, A.  [Crystal Structure of Cementite.]  Jernkontorets Ann., vol. 114, 1932, pp. 457-468; Chem. Abs., vol. 27, 1933, p. 1301.

        Grouping of Fe atoms suggested by Hendricks (abs. 1400) is verified, but the parameters have been slightly adjusted as follows:  x=0.333, y=0.175, z=0.065, u=-0.167, and v=0.04.  The C atoms are surrounded by 6 Fe atoms at the distance 2.01 . U., which define a regular prism on a triangular isosceles base.  11 refs.

        ----------.  See abs. 1601.