SmMnO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 30°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sm(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sm(1) and two equivalent Mn(1) atoms.
SmMnO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. There is one shorter (2.32 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 2.37-2.68 Å. Mn(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 30°. Both Mn(1)-O(2) bond lengths are 1.98 Å. There are two shorter (1.96 Å) and two longer (2.06 Å) Mn(1)-O(1) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sm(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sm(1) and two equivalent Mn(1) atoms.