RbLi2Ni2(BO3)3 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. 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 and corners with three equivalent Ni(1)O4 tetrahedra. Ni(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NiO4 tetrahedra that share corners with three equivalent Li(1)O4 tetrahedra. 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 Ni(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 Ni(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 Ni(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 Ni(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.
RbLi2Ni2(BO3)3 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. Both Rb(1)-O(2) bond lengths are 3.03 Å. Both Rb(1)-O(3) bond lengths are 3.48 Å. Both Rb(1)-O(4) bond lengths are 3.41 Å. Both Rb(1)-O(5) bond lengths are 3.32 Å. There are two shorter (3.09 Å) and two longer (3.14 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 and corners with three equivalent Ni(1)O4 tetrahedra. The Li(1)-O(2) bond length is 2.01 Å. The Li(1)-O(3) bond length is 1.96 Å. The Li(1)-O(4) bond length is 1.95 Å. The Li(1)-O(5) bond length is 1.89 Å. Ni(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NiO4 tetrahedra that share corners with three equivalent Li(1)O4 tetrahedra. The Ni(1)-O(1) bond length is 1.85 Å. The Ni(1)-O(2) bond length is 1.89 Å. The Ni(1)-O(3) bond length is 1.87 Å. The Ni(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 Ni(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 Ni(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 Ni(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 Ni(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.