Sm2WO6 crystallizes in the monoclinic P2/c space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Sm site, Sm(2) 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 third Sm site, Sm(3) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. W(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of edge and corner-sharing OSm3W tetrahedra. 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 to one Sm(1), one Sm(2), one Sm(3), and one W(1) atom to form a mixture of edge and corner-sharing OSm3W tetrahedra. In the fourth O site, O(4) is bonded to one Sm(1), one Sm(2), one Sm(3), and one W(1) atom to form a mixture of distorted edge and corner-sharing OSm3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one W(1) atom.
Sm2WO6 crystallizes in the monoclinic P2/c space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Sm(1)-O(1) bond lengths are 2.33 Å. Both Sm(1)-O(2) bond lengths are 2.44 Å. Both Sm(1)-O(3) bond lengths are 2.31 Å. Both Sm(1)-O(4) bond lengths are 2.60 Å. In the second Sm site, Sm(2) 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(2)-O(2) bond length is 2.31 Å. The Sm(2)-O(3) bond length is 2.30 Å. The Sm(2)-O(4) bond length is 2.48 Å. The Sm(2)-O(5) bond length is 2.34 Å. The Sm(2)-O(6) bond length is 2.39 Å. There is one shorter (2.32 Å) and one longer (2.45 Å) Sm(2)-O(1) bond length. In the third Sm site, Sm(3) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. Both Sm(3)-O(3) bond lengths are 2.47 Å. Both Sm(3)-O(4) bond lengths are 2.40 Å. Both Sm(3)-O(5) bond lengths are 2.52 Å. Both Sm(3)-O(6) bond lengths are 2.39 Å. W(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The W(1)-O(1) bond length is 2.04 Å. The W(1)-O(2) bond length is 1.89 Å. The W(1)-O(3) bond length is 2.07 Å. The W(1)-O(4) bond length is 1.95 Å. The W(1)-O(5) bond length is 1.87 Å. The W(1)-O(6) bond length is 1.85 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Sm(1), two equivalent Sm(2), and one W(1) atom to form a mixture of edge and corner-sharing OSm3W tetrahedra. 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 to one Sm(1), one Sm(2), one Sm(3), and one W(1) atom to form a mixture of edge and corner-sharing OSm3W tetrahedra. In the fourth O site, O(4) is bonded to one Sm(1), one Sm(2), one Sm(3), and one W(1) atom to form a mixture of distorted edge and corner-sharing OSm3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one W(1) atom.