RbLu(WO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. Lu(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(6), one O(8), two equivalent O(1), and two equivalent O(7) 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(2), one O(3), one O(4), one O(6), and one O(8) atom. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one W(2) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one Lu(1), one W(1), and one W(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Rb(1), two equivalent Lu(1), and one W(2) atom. In the fourth O site, O(8) is bonded in a 3-coordinate geometry to one Lu(1), one W(1), and one W(2) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Lu(1), one W(1), and one W(2) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and one W(1) atom. In the seventh O site, O(3) is bonded in a bent 150 degrees geometry to one Lu(1) and one W(1) atom. In the eighth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Lu(1), and one W(1) atom.
RbLu(WO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 8-coordinate geometry to one O(6), one O(7), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. The Rb(1)-O(6) bond length is 3.17 Å. The Rb(1)-O(7) bond length is 3.13 Å. There is one shorter (2.83 Å) and one longer (2.91 Å) Rb(1)-O(2) bond length. There is one shorter (3.08 Å) and one longer (3.11 Å) Rb(1)-O(4) bond length. There is one shorter (3.01 Å) and one longer (3.19 Å) Rb(1)-O(5) bond length. Lu(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(6), one O(8), two equivalent O(1), and two equivalent O(7) atoms. The Lu(1)-O(3) bond length is 2.19 Å. The Lu(1)-O(4) bond length is 2.23 Å. The Lu(1)-O(6) bond length is 2.33 Å. The Lu(1)-O(8) bond length is 2.28 Å. There is one shorter (2.28 Å) and one longer (2.81 Å) Lu(1)-O(1) bond length. There is one shorter (2.21 Å) and one longer (2.71 Å) Lu(1)-O(7) 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(2), one O(3), one O(4), one O(6), and one O(8) atom. The W(1)-O(1) bond length is 2.38 Å. The W(1)-O(2) bond length is 1.77 Å. The W(1)-O(3) bond length is 1.84 Å. The W(1)-O(4) bond length is 1.85 Å. The W(1)-O(6) bond length is 2.10 Å. The W(1)-O(8) bond length is 2.14 Å. In the second W site, W(2) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and one O(8) atom. The W(2)-O(1) bond length is 1.91 Å. The W(2)-O(5) bond length is 1.76 Å. The W(2)-O(6) bond length is 1.99 Å. The W(2)-O(7) bond length is 1.85 Å. The W(2)-O(8) bond length is 2.07 Å. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one W(2) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one Lu(1), one W(1), and one W(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Rb(1), two equivalent Lu(1), and one W(2) atom. In the fourth O site, O(8) is bonded in a 3-coordinate geometry to one Lu(1), one W(1), and one W(2) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Lu(1), one W(1), and one W(2) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Rb(1) and one W(1) atom. In the seventh O site, O(3) is bonded in a bent 150 degrees geometry to one Lu(1) and one W(1) atom. In the eighth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Lu(1), and one W(1) atom.