YCu(WO4)2 crystallizes in the triclinic P1 space group. Y(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form YO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-54°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Y(1)O6 octahedra and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-54°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with four equivalent Y(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-54°. Cu(1) is bonded in a distorted linear geometry to one O(1), one O(3), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Y(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Y(1), one W(1), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Y(1) and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Y(1) and one W(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Y(1), one W(1), and one W(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one W(1) atom.
YCu(WO4)2 crystallizes in the triclinic P1 space group. Y(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form YO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-54°. The Y(1)-O(2) bond length is 2.32 Å. The Y(1)-O(3) bond length is 2.31 Å. The Y(1)-O(4) bond length is 2.30 Å. The Y(1)-O(6) bond length is 2.31 Å. The Y(1)-O(7) bond length is 2.32 Å. The Y(1)-O(8) bond length is 2.30 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Y(1)O6 octahedra and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-54°. The W(1)-O(1) bond length is 1.94 Å. The W(1)-O(2) bond length is 2.15 Å. The W(1)-O(3) bond length is 1.82 Å. The W(1)-O(5) bond length is 2.18 Å. The W(1)-O(7) bond length is 1.99 Å. The W(1)-O(8) bond length is 1.82 Å. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with four equivalent Y(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-54°. The W(2)-O(1) bond length is 2.18 Å. The W(2)-O(2) bond length is 1.99 Å. The W(2)-O(4) bond length is 1.82 Å. The W(2)-O(5) bond length is 1.94 Å. The W(2)-O(6) bond length is 1.82 Å. The W(2)-O(7) bond length is 2.15 Å. Cu(1) is bonded in a distorted linear geometry to one O(1), one O(3), and one O(5) atom. The Cu(1)-O(1) bond length is 1.85 Å. The Cu(1)-O(3) bond length is 2.61 Å. The Cu(1)-O(5) bond length is 1.85 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Y(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Y(1), one W(1), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Y(1) and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Y(1) and one W(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Y(1), one W(1), and one W(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one W(1) atom.