RbLi2Co2(BO3)3 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms to form distorted RbO12 cuboctahedra that share corners with two equivalent Rb(1)O12 cuboctahedra, corners with two equivalent Co(1)O4 tetrahedra, edges with two equivalent Rb(1)O12 cuboctahedra, edges with two equivalent Li(1)O4 tetrahedra, edges with four equivalent Co(1)O4 tetrahedra, and faces with two equivalent Li(1)O4 tetrahedra. Li(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Rb(1)O12 cuboctahedra, and  a faceface with one Rb(1)O12 cuboctahedra. Co(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Rb(1)O12 cuboctahedra, corners with three equivalent Li(1)O4 tetrahedra, and edges with two equivalent Rb(1)O12 cuboctahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(5) and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Co(1), and one B(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Li(1), one Co(1), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Rb(1), one Li(1), one Co(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Rb(1), one Li(1), one Co(1), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1), two equivalent Li(1), and one B(2) atom.
RbLi2Co2(BO3)3 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms to form distorted RbO12 cuboctahedra that share corners with two equivalent Rb(1)O12 cuboctahedra, corners with two equivalent Co(1)O4 tetrahedra, edges with two equivalent Rb(1)O12 cuboctahedra, edges with two equivalent Li(1)O4 tetrahedra, edges with four equivalent Co(1)O4 tetrahedra, and faces with two equivalent Li(1)O4 tetrahedra. Both Rb(1)-O(2) bond lengths are 3.05 Å. Both Rb(1)-O(3) bond lengths are 3.46 Å. Both Rb(1)-O(4) bond lengths are 3.40 Å. Both Rb(1)-O(5) bond lengths are 3.34 Å. There are two shorter (3.12 Å) and two longer (3.17 Å) Rb(1)-O(1) bond lengths. Li(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra,  an edgeedge with one Rb(1)O12 cuboctahedra, and  a faceface with one Rb(1)O12 cuboctahedra. The Li(1)-O(2) bond length is 2.01 Å. The Li(1)-O(3) bond length is 1.99 Å. The Li(1)-O(4) bond length is 1.96 Å. The Li(1)-O(5) bond length is 1.89 Å. Co(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Rb(1)O12 cuboctahedra, corners with three equivalent Li(1)O4 tetrahedra, and edges with two equivalent Rb(1)O12 cuboctahedra. The Co(1)-O(1) bond length is 1.87 Å. The Co(1)-O(2) bond length is 1.91 Å. The Co(1)-O(3) bond length is 1.87 Å. The Co(1)-O(4) bond length is 1.85 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(1)-O(1) bond length is 1.38 Å. The B(1)-O(2) bond length is 1.39 Å. The B(1)-O(3) bond length is 1.38 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(5) and two equivalent O(4) atoms. The B(2)-O(5) bond length is 1.34 Å. Both B(2)-O(4) bond lengths are 1.41 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Rb(1), one Co(1), and one B(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Li(1), one Co(1), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Rb(1), one Li(1), one Co(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Rb(1), one Li(1), one Co(1), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1), two equivalent Li(1), and one B(2) atom.