Sm3RuO7 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one O(1), two equivalent O(2), and four equivalent O(3) atoms to form distorted SmO7 pentagonal bipyramids that share corners with two equivalent Ru(1)O6 octahedra, corners with three equivalent Sm(1)O7 pentagonal bipyramids, edges with two equivalent Ru(1)O6 octahedra, and edges with two equivalent Sm(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 34°. In the second Sm site, Sm(2) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra, corners with four equivalent Sm(1)O7 pentagonal bipyramids, and edges with four equivalent Sm(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 37°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sm(1) and two equivalent Ru(1) atoms. In the second O site, O(2) is bonded to two equivalent Sm(1) and two equivalent Sm(2) atoms to form a mixture of corner and edge-sharing OSm4 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(2), two equivalent Sm(1), and one Ru(1) atom.
Sm3RuO7 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one O(1), two equivalent O(2), and four equivalent O(3) atoms to form distorted SmO7 pentagonal bipyramids that share corners with two equivalent Ru(1)O6 octahedra, corners with three equivalent Sm(1)O7 pentagonal bipyramids, edges with two equivalent Ru(1)O6 octahedra, and edges with two equivalent Sm(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 34°. The Sm(1)-O(1) bond length is 2.52 Å. Both Sm(1)-O(2) bond lengths are 2.26 Å. There are two shorter (2.40 Å) and two longer (2.43 Å) Sm(1)-O(3) bond lengths. In the second Sm site, Sm(2) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. All Sm(2)-O(2) bond lengths are 2.35 Å. All Sm(2)-O(3) bond lengths are 2.69 Å. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra, corners with four equivalent Sm(1)O7 pentagonal bipyramids, and edges with four equivalent Sm(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 37°. Both Ru(1)-O(1) bond lengths are 1.97 Å. All Ru(1)-O(3) bond lengths are 1.95 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sm(1) and two equivalent Ru(1) atoms. In the second O site, O(2) is bonded to two equivalent Sm(1) and two equivalent Sm(2) atoms to form a mixture of corner and edge-sharing OSm4 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(2), two equivalent Sm(1), and one Ru(1) atom.