Tm2WO6 crystallizes in the monoclinic P2/c space group. There are three inequivalent Tm sites. In the first Tm site, Tm(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 Tm site, Tm(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 Tm site, Tm(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 Tm(1), two equivalent Tm(2), and one W(1) atom to form a mixture of edge and corner-sharing OTm3W tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Tm(1), one Tm(2), and one W(1) atom. In the third O site, O(3) is bonded to one Tm(1), one Tm(2), one Tm(3), and one W(1) atom to form a mixture of edge and corner-sharing OTm3W tetrahedra. In the fourth O site, O(4) is bonded to one Tm(1), one Tm(2), one Tm(3), and one W(1) atom to form a mixture of distorted edge and corner-sharing OTm3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Tm(2), one Tm(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Tm(2), one Tm(3), and one W(1) atom.
Tm2WO6 crystallizes in the monoclinic P2/c space group. There are three inequivalent Tm sites. In the first Tm site, Tm(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 Tm(1)-O(1) bond lengths are 2.24 Å. Both Tm(1)-O(2) bond lengths are 2.32 Å. Both Tm(1)-O(3) bond lengths are 2.22 Å. Both Tm(1)-O(4) bond lengths are 2.49 Å. In the second Tm site, Tm(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 Tm(2)-O(2) bond length is 2.20 Å. The Tm(2)-O(3) bond length is 2.20 Å. The Tm(2)-O(4) bond length is 2.34 Å. The Tm(2)-O(5) bond length is 2.23 Å. The Tm(2)-O(6) bond length is 2.27 Å. There is one shorter (2.22 Å) and one longer (2.36 Å) Tm(2)-O(1) bond length. In the third Tm site, Tm(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 Tm(3)-O(3) bond lengths are 2.42 Å. Both Tm(3)-O(4) bond lengths are 2.29 Å. Both Tm(3)-O(5) bond lengths are 2.37 Å. Both Tm(3)-O(6) bond lengths are 2.28 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 2.02 Å. The W(1)-O(2) bond length is 1.88 Å. The W(1)-O(3) bond length is 2.06 Å. The W(1)-O(4) bond length is 1.96 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 Tm(1), two equivalent Tm(2), and one W(1) atom to form a mixture of edge and corner-sharing OTm3W tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Tm(1), one Tm(2), and one W(1) atom. In the third O site, O(3) is bonded to one Tm(1), one Tm(2), one Tm(3), and one W(1) atom to form a mixture of edge and corner-sharing OTm3W tetrahedra. In the fourth O site, O(4) is bonded to one Tm(1), one Tm(2), one Tm(3), and one W(1) atom to form a mixture of distorted edge and corner-sharing OTm3W tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Tm(2), one Tm(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Tm(2), one Tm(3), and one W(1) atom.