CuBi(WO4)2 crystallizes in the triclinic P1 space group. 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(6), and one O(7) atom to form distorted WO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-55°. Cu(1) is bonded in a distorted linear geometry to one O(2), one O(3), and one O(7) atom. Bi(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form BiO6 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 36-55°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one W(1), one Cu(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one W(2) and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one W(1) and one Bi(1) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Bi(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one W(2) and one Bi(1) atom.
CuBi(WO4)2 crystallizes in the triclinic P1 space group. 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(6), and one O(7) atom to form distorted WO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra and edges with two equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-55°. The W(1)-O(1) bond length is 2.00 Å. The W(1)-O(2) bond length is 2.20 Å. The W(1)-O(3) bond length is 1.82 Å. The W(1)-O(5) bond length is 1.82 Å. The W(1)-O(6) bond length is 2.14 Å. The W(1)-O(7) bond length is 1.93 Å. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with four equivalent Bi(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-55°. The W(2)-O(1) bond length is 2.14 Å. The W(2)-O(2) bond length is 1.93 Å. The W(2)-O(4) bond length is 1.83 Å. The W(2)-O(6) bond length is 2.00 Å. The W(2)-O(7) bond length is 2.20 Å. The W(2)-O(8) bond length is 1.82 Å. Cu(1) is bonded in a distorted linear geometry to one O(2), one O(3), and one O(7) atom. The Cu(1)-O(2) bond length is 1.86 Å. The Cu(1)-O(3) bond length is 2.60 Å. The Cu(1)-O(7) bond length is 1.86 Å. Bi(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form BiO6 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 36-55°. The Bi(1)-O(1) bond length is 2.39 Å. The Bi(1)-O(3) bond length is 2.39 Å. The Bi(1)-O(4) bond length is 2.36 Å. The Bi(1)-O(5) bond length is 2.37 Å. The Bi(1)-O(6) bond length is 2.38 Å. The Bi(1)-O(8) bond length is 2.38 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one W(1), one Cu(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one W(2) and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one W(1) and one Bi(1) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one W(1), one W(2), and one Bi(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Cu(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one W(2) and one Bi(1) atom.