Fe5C2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a bent 150 degrees geometry to two equivalent C(1) atoms. In the second Fe site, Fe(3) is bonded to four equivalent C(1) atoms to form distorted edge-sharing FeC4 tetrahedra. In the third Fe site, Fe(2) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. C(1) is bonded in a 7-coordinate geometry to two equivalent Fe(1), two equivalent Fe(3), and three equivalent Fe(2) atoms.
Fe5C2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a bent 150 degrees geometry to two equivalent C(1) atoms. There is one shorter (1.96 Å) and one longer (2.01 Å) Fe(1)-C(1) bond length. In the second Fe site, Fe(3) is bonded to four equivalent C(1) atoms to form distorted edge-sharing FeC4 tetrahedra. There are two shorter (2.01 Å) and two longer (2.03 Å) Fe(3)-C(1) bond lengths. In the third Fe site, Fe(2) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. There are two shorter (1.95 Å) and one longer (2.26 Å) Fe(2)-C(1) bond length. C(1) is bonded in a 7-coordinate geometry to two equivalent Fe(1), two equivalent Fe(3), and three equivalent Fe(2) atoms.