Table 3.

The fraction coordination of twelve Fe atoms and four C atom of θ′-Fe₃C in orthorhombic structure with the lattice parameters of a_θ′ = $\sqrt{2}$a_α-Fe = 4.033 Å_, b_{θ′ =} $\sqrt{3}$a_α-Fe = 4.94 _Å, c_θ′ = $\sqrt{6}$a_α-Fe = 6.986 Å for a_α-Fe = 2.852 Å. Various variants are formed depending on the position and concentration of the intestinal carbon atoms.

Atoms	aθ′	bθ′	cθ′
Fe1	0	0	0
Fe2	1/2	0	1/2
Fe3	0	1/2	0
Fe4	1/2	1/2	1/2
Fe5	1/2	1/4	1/6
Fe6	1/2	1/4	5/6
Fe7	0	1/4	1/3
Fe8	0	1/4	2/3
Fe9	1/2	3/4	1/6
Fe10	1/2	3/4	5/6
Fe11	0	3/4	1/3
Fe12	0	3/4	2/3
C1	0	0	1/2
C2	1/2	0	0
C3	0	1/2	1/2
C4	1/2	1/2	0