CeBiW2O9 crystallizes in the monoclinic C2/c space group. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), one O(8), and two equivalent O(9) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. In the second W site, W(2) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(9) atom to form distorted edge-sharing WO6 octahedra. Bi(1) is bonded in a 6-coordinate geometry to one O(3), one O(7), two equivalent O(10), and two equivalent O(4) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ce(1), one W(1), and one W(2) atom. In the second O site, O(10) is bonded in a distorted single-bond geometry to one W(2) and two equivalent Bi(1) atoms. In the third O site, O(2) is bonded in a water-like geometry to two equivalent W(2) atoms. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ce(1), one W(2), and one Bi(1) atom. In the fifth O site, O(4) is bonded to one Ce(1), one W(1), and two equivalent Bi(1) atoms to form distorted edge-sharing OCeBi2W tetrahedra. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Ce(1) and one W(1) atom. In the seventh O site, O(6) is bonded in a water-like geometry to two equivalent W(2) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ce(1), one W(1), and one Bi(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent W(1) atoms. In the tenth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ce(1) and one W(2) atom.
CeBiW2O9 crystallizes in the monoclinic C2/c space group. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), one O(8), and two equivalent O(9) atoms. The Ce(1)-O(1) bond length is 2.44 Å. The Ce(1)-O(3) bond length is 2.56 Å. The Ce(1)-O(4) bond length is 2.68 Å. The Ce(1)-O(5) bond length is 2.49 Å. The Ce(1)-O(7) bond length is 2.47 Å. The Ce(1)-O(8) bond length is 2.67 Å. There is one shorter (2.37 Å) and one longer (2.59 Å) Ce(1)-O(9) bond length. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. The W(1)-O(1) bond length is 1.90 Å. The W(1)-O(4) bond length is 2.07 Å. The W(1)-O(5) bond length is 1.82 Å. The W(1)-O(7) bond length is 1.95 Å. There is one shorter (1.88 Å) and one longer (2.28 Å) W(1)-O(8) bond length. In the second W site, W(2) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(9) atom to form distorted edge-sharing WO6 octahedra. The W(2)-O(1) bond length is 2.13 Å. The W(2)-O(10) bond length is 1.86 Å. The W(2)-O(2) bond length is 2.04 Å. The W(2)-O(3) bond length is 1.87 Å. The W(2)-O(6) bond length is 2.03 Å. The W(2)-O(9) bond length is 1.89 Å. Bi(1) is bonded in a 6-coordinate geometry to one O(3), one O(7), two equivalent O(10), and two equivalent O(4) atoms. The Bi(1)-O(3) bond length is 2.47 Å. The Bi(1)-O(7) bond length is 2.28 Å. There is one shorter (2.67 Å) and one longer (2.68 Å) Bi(1)-O(10) bond length. There is one shorter (2.30 Å) and one longer (2.40 Å) Bi(1)-O(4) bond length. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ce(1), one W(1), and one W(2) atom. In the second O site, O(10) is bonded in a distorted single-bond geometry to one W(2) and two equivalent Bi(1) atoms. In the third O site, O(2) is bonded in a water-like geometry to two equivalent W(2) atoms. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ce(1), one W(2), and one Bi(1) atom. In the fifth O site, O(4) is bonded to one Ce(1), one W(1), and two equivalent Bi(1) atoms to form distorted edge-sharing OCeBi2W tetrahedra. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Ce(1) and one W(1) atom. In the seventh O site, O(6) is bonded in a water-like geometry to two equivalent W(2) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ce(1), one W(1), and one Bi(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent W(1) atoms. In the tenth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ce(1) and one W(2) atom.