Table 2.

The fraction coordination of six Fe atoms and two C atom of ω′-Fe₃C in orthorhombic structure with the lattice parameters of a_ω′ = $\sqrt{2}$a_α-Fe = 4.033 Å_, b_{ω′ =} $\frac{\sqrt{3}}{2}$a_{α-Fe =} 2.47 _Å, c_ω′ = $\sqrt{6}$a_α-Fe = 6.986 Å for a_α-Fe = 2.852 Å. New variant of the ω′ carbide can be formed depending on the carbon concentration and positions.

Atoms	aω′	bω′	cω′
Fe1	0	0	0
Fe2	1/2	0	1/2
Fe3	1/2	1/2	1/6
Fe4	1/2	1/2	5/6
Fe5	0	1/2	1/3
Fe6	0	1/2	2/3
C1	1/2	0	0
C2	0	0	1/2