Sm2WO6 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms. In the second Sm site, Sm(2) is bonded to one O(2), one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted SmO7 hexagonal pyramids that share corners with three equivalent W(1)O6 octahedra, edges with two equivalent Sm(2)O7 hexagonal pyramids, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-45°. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share corners with three equivalent Sm(2)O7 hexagonal pyramids and edges with two equivalent Sm(2)O7 hexagonal pyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to two equivalent Sm(1) and one W(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(2), and one W(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(2), and one W(1) atom. In the fifth O site, O(5) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of distorted corner and edge-sharing OSm3W tetrahedra. In the sixth O site, O(6) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of corner and edge-sharing OSm3W tetrahedra.
Sm2WO6 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms. The Sm(1)-O(2) bond length is 2.38 Å. The Sm(1)-O(3) bond length is 2.46 Å. The Sm(1)-O(4) bond length is 2.35 Å. The Sm(1)-O(5) bond length is 2.61 Å. The Sm(1)-O(6) bond length is 2.35 Å. There is one shorter (2.29 Å) and one longer (2.31 Å) Sm(1)-O(1) bond length. In the second Sm site, Sm(2) is bonded to one O(2), one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted SmO7 hexagonal pyramids that share corners with three equivalent W(1)O6 octahedra, edges with two equivalent Sm(2)O7 hexagonal pyramids, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-45°. The Sm(2)-O(2) bond length is 2.36 Å. The Sm(2)-O(3) bond length is 2.38 Å. The Sm(2)-O(4) bond length is 2.39 Å. There is one shorter (2.36 Å) and one longer (2.43 Å) Sm(2)-O(5) bond length. There is one shorter (2.38 Å) and one longer (2.43 Å) Sm(2)-O(6) bond length. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share corners with three equivalent Sm(2)O7 hexagonal pyramids and edges with two equivalent Sm(2)O7 hexagonal pyramids. The W(1)-O(1) bond length is 1.95 Å. The W(1)-O(2) bond length is 1.86 Å. The W(1)-O(3) bond length is 1.91 Å. The W(1)-O(4) bond length is 1.89 Å. The W(1)-O(5) bond length is 1.97 Å. The W(1)-O(6) bond length is 2.01 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to two equivalent Sm(1) and one W(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(2), and one W(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(2), and one W(1) atom. In the fifth O site, O(5) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of distorted corner and edge-sharing OSm3W tetrahedra. In the sixth O site, O(6) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of corner and edge-sharing OSm3W tetrahedra.