Fe2Co3N4 crystallizes in the monoclinic C2/c space group. Fe(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of distorted corner and edge-sharing FeN4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent N(1) and two equivalent N(2) atoms. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and four equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to two equivalent Fe(1), one Co(2), and two equivalent Co(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Fe(1), two equivalent Co(1), and two equivalent Co(2) atoms.
Fe2Co3N4 crystallizes in the monoclinic C2/c space group. Fe(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form a mixture of distorted corner and edge-sharing FeN4 tetrahedra. There is one shorter (1.87 Å) and one longer (1.92 Å) Fe(1)-N(1) bond length. There is one shorter (1.83 Å) and one longer (1.89 Å) Fe(1)-N(2) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent N(1) and two equivalent N(2) atoms. There is one shorter (1.93 Å) and one longer (1.97 Å) Co(1)-N(1) bond length. There is one shorter (1.92 Å) and one longer (2.08 Å) Co(1)-N(2) bond length. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to two equivalent N(1) and four equivalent N(2) atoms. Both Co(2)-N(1) bond lengths are 1.91 Å. There are two shorter (1.95 Å) and two longer (2.58 Å) Co(2)-N(2) bond lengths. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to two equivalent Fe(1), one Co(2), and two equivalent Co(1) atoms. In the second N site, N(2) is bonded in a 6-coordinate geometry to two equivalent Fe(1), two equivalent Co(1), and two equivalent Co(2) atoms.