Mn5C2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. In the second Mn site, Mn(2) is bonded to four equivalent C(1) atoms to form distorted edge-sharing MnC4 tetrahedra. In the third Mn site, Mn(3) is bonded in a bent 150 degrees geometry to two equivalent C(1) atoms. C(1) is bonded in a 7-coordinate geometry to two equivalent Mn(2), two equivalent Mn(3), and three equivalent Mn(1) atoms.
Mn5C2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. There are two shorter (1.97 Å) and one longer (2.23 Å) Mn(1)-C(1) bond length. In the second Mn site, Mn(2) is bonded to four equivalent C(1) atoms to form distorted edge-sharing MnC4 tetrahedra. There are two shorter (2.01 Å) and two longer (2.03 Å) Mn(2)-C(1) bond lengths. In the third Mn site, Mn(3) is bonded in a bent 150 degrees geometry to two equivalent C(1) atoms. There is one shorter (1.98 Å) and one longer (2.01 Å) Mn(3)-C(1) bond length. C(1) is bonded in a 7-coordinate geometry to two equivalent Mn(2), two equivalent Mn(3), and three equivalent Mn(1) atoms.