Sm2(WO4)3 crystallizes in the monoclinic C2/c space group. Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(6), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(5), and two equivalent O(6) atoms. In the second W site, W(2) is bonded in a tetrahedral geometry to two equivalent O(2) and two equivalent O(3) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one W(1) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Sm(1) and two equivalent W(1) atoms.
Sm2(WO4)3 crystallizes in the monoclinic C2/c space group. Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(6), two equivalent O(3), and two equivalent O(5) atoms. The Sm(1)-O(1) bond length is 2.36 Å. The Sm(1)-O(2) bond length is 2.42 Å. The Sm(1)-O(4) bond length is 2.47 Å. The Sm(1)-O(6) bond length is 2.44 Å. There is one shorter (2.50 Å) and one longer (2.51 Å) Sm(1)-O(3) bond length. There is one shorter (2.39 Å) and one longer (2.50 Å) Sm(1)-O(5) bond length. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 5-coordinate geometry to one O(1), one O(4), one O(5), and two equivalent O(6) atoms. The W(1)-O(1) bond length is 1.83 Å. The W(1)-O(4) bond length is 1.78 Å. The W(1)-O(5) bond length is 1.88 Å. There is one shorter (1.93 Å) and one longer (2.15 Å) W(1)-O(6) bond length. In the second W site, W(2) is bonded in a tetrahedral geometry to two equivalent O(2) and two equivalent O(3) atoms. Both W(2)-O(2) bond lengths are 1.80 Å. Both W(2)-O(3) bond lengths are 1.85 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Sm(1) and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one W(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one W(1) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Sm(1) and two equivalent W(1) atoms.