RbLiCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. Li(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one S(1)O4 tetrahedra and  an edgeedge with one S(2)O4 tetrahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(2), one O(5), one O(6), and one O(8) atom. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one O(1), one O(5), one O(6), and one O(8) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form SO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra. In the second S site, S(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form SO4 tetrahedra that share  an edgeedge with one Li(1)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Rb(1), one Cu(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cu(1), one Cu(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted tetrahedral geometry to one Li(1), one Cu(1), one Cu(2), and one H(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Rb(1), one Cu(1), one Cu(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one S(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one S(2) atom.
RbLiCu2H3(SO5)2 crystallizes in the triclinic P1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. The Rb(1)-O(1) bond length is 2.86 Å. The Rb(1)-O(2) bond length is 2.87 Å. The Rb(1)-O(3) bond length is 2.89 Å. The Rb(1)-O(4) bond length is 2.89 Å. The Rb(1)-O(7) bond length is 3.00 Å. The Rb(1)-O(8) bond length is 3.06 Å. Li(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one S(1)O4 tetrahedra and  an edgeedge with one S(2)O4 tetrahedra. The Li(1)-O(3) bond length is 2.09 Å. The Li(1)-O(4) bond length is 2.08 Å. The Li(1)-O(6) bond length is 1.94 Å. The Li(1)-O(7) bond length is 1.92 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(2), one O(5), one O(6), and one O(8) atom. The Cu(1)-O(2) bond length is 1.94 Å. The Cu(1)-O(5) bond length is 2.49 Å. The Cu(1)-O(6) bond length is 1.98 Å. The Cu(1)-O(8) bond length is 2.02 Å. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to one O(1), one O(5), one O(6), and one O(8) atom. The Cu(2)-O(1) bond length is 1.94 Å. The Cu(2)-O(5) bond length is 2.49 Å. The Cu(2)-O(6) bond length is 1.98 Å. The Cu(2)-O(8) bond length is 2.02 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 0.98 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form SO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra. The S(1)-O(1) bond length is 1.53 Å. The S(1)-O(2) bond length is 1.53 Å. The S(1)-O(7) bond length is 1.48 Å. The S(1)-O(9) bond length is 1.46 Å. In the second S site, S(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form SO4 tetrahedra that share  an edgeedge with one Li(1)O4 tetrahedra. The S(2)-O(10) bond length is 1.45 Å. The S(2)-O(3) bond length is 1.49 Å. The S(2)-O(4) bond length is 1.49 Å. The S(2)-O(8) bond length is 1.59 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Rb(1), one Cu(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Rb(1), one Cu(1), and one S(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(2) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cu(1), one Cu(2), one H(1), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted tetrahedral geometry to one Li(1), one Cu(1), one Cu(2), and one H(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Rb(1), one Li(1), and one S(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Rb(1), one Cu(1), one Cu(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one S(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one S(2) atom.