Sm2Co2O5 crystallizes in the orthorhombic Ima2 space group. Sm(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 21°. In the second Co site, Co(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Sm(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sm(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded to two equivalent Sm(1) and two equivalent Co(2) atoms to form corner-sharing OSm2Co2 tetrahedra.
Sm2Co2O5 crystallizes in the orthorhombic Ima2 space group. Sm(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(2), and four equivalent O(1) atoms. The Sm(1)-O(3) bond length is 2.32 Å. There is one shorter (2.28 Å) and one longer (2.39 Å) Sm(1)-O(2) bond length. There are a spread of Sm(1)-O(1) bond distances ranging from 2.46-2.77 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 21°. Both Co(1)-O(2) bond lengths are 2.26 Å. There are two shorter (2.01 Å) and two longer (2.02 Å) Co(1)-O(1) bond lengths. In the second Co site, Co(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent Co(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. Both Co(2)-O(2) bond lengths are 1.94 Å. There is one shorter (2.03 Å) and one longer (2.06 Å) Co(2)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Sm(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sm(1), one Co(1), and one Co(2) atom. In the third O site, O(3) is bonded to two equivalent Sm(1) and two equivalent Co(2) atoms to form corner-sharing OSm2Co2 tetrahedra.