Rb5(CoO2)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of distorted corner and edge-sharing RbO4 tetrahedra. In the second Rb site, Rb(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of distorted corner and edge-sharing RbO4 tetrahedra. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(3), one O(4), and two equivalent O(1) atoms. In the fourth Rb site, Rb(4) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(4) atom. In the fifth Rb site, Rb(5) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(2) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(3) atoms. In the second Co site, Co(2) is bonded in a linear geometry to one O(2) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), two equivalent Rb(3), and one Co(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), two equivalent Rb(5), and one Co(2) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(2), one Rb(3), one Rb(5), and two equivalent Co(1) atoms to form distorted edge-sharing ORb4Co2 octahedra. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), and one Co(2) atom.
Rb5(CoO2)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of distorted corner and edge-sharing RbO4 tetrahedra. The Rb(1)-O(1) bond length is 2.86 Å. The Rb(1)-O(2) bond length is 2.86 Å. The Rb(1)-O(3) bond length is 2.88 Å. The Rb(1)-O(4) bond length is 2.94 Å. In the second Rb site, Rb(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form a mixture of distorted corner and edge-sharing RbO4 tetrahedra. The Rb(2)-O(1) bond length is 2.86 Å. The Rb(2)-O(2) bond length is 2.84 Å. The Rb(2)-O(3) bond length is 2.90 Å. The Rb(2)-O(4) bond length is 2.93 Å. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(3), one O(4), and two equivalent O(1) atoms. The Rb(3)-O(3) bond length is 2.89 Å. The Rb(3)-O(4) bond length is 2.96 Å. There is one shorter (2.85 Å) and one longer (2.91 Å) Rb(3)-O(1) bond length. In the fourth Rb site, Rb(4) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(4) atom. The Rb(4)-O(1) bond length is 2.86 Å. The Rb(4)-O(2) bond length is 2.84 Å. The Rb(4)-O(4) bond length is 2.81 Å. In the fifth Rb site, Rb(5) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(2) atoms. The Rb(5)-O(3) bond length is 2.96 Å. There is one shorter (2.84 Å) and one longer (2.85 Å) Rb(5)-O(2) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(3) atoms. The Co(1)-O(1) bond length is 1.76 Å. There is one shorter (1.86 Å) and one longer (1.95 Å) Co(1)-O(3) bond length. In the second Co site, Co(2) is bonded in a linear geometry to one O(2) and one O(4) atom. The Co(2)-O(2) bond length is 1.76 Å. The Co(2)-O(4) bond length is 1.76 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), two equivalent Rb(3), and one Co(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), two equivalent Rb(5), and one Co(2) atom. In the third O site, O(3) is bonded to one Rb(1), one Rb(2), one Rb(3), one Rb(5), and two equivalent Co(1) atoms to form distorted edge-sharing ORb4Co2 octahedra. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), and one Co(2) atom.