RbTlS2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(4), one S(5), and two equivalent S(1) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(4), one S(5), and two equivalent S(1) atoms. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to one S(1), one S(2), one S(4), and one S(5) atom to form corner-sharing TlS4 tetrahedra. In the second Tl site, Tl(2) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form corner-sharing TlS4 tetrahedra. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Tl(1), and one Tl(2) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Rb(1), one Rb(2), one Tl(1), and one Tl(2) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Tl(2) atoms. In the fourth S site, S(4) is bonded in a distorted rectangular see-saw-like geometry to one Rb(1), one Rb(2), one Tl(1), and one Tl(2) atom. In the fifth S site, S(5) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Tl(1) atoms.
RbTlS2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(4), one S(5), and two equivalent S(1) atoms. The Rb(1)-S(2) bond length is 3.39 Å. The Rb(1)-S(3) bond length is 3.53 Å. The Rb(1)-S(4) bond length is 3.39 Å. The Rb(1)-S(5) bond length is 3.54 Å. There is one shorter (3.53 Å) and one longer (3.54 Å) Rb(1)-S(1) bond length. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one S(2), one S(3), one S(4), one S(5), and two equivalent S(1) atoms. The Rb(2)-S(2) bond length is 3.34 Å. The Rb(2)-S(3) bond length is 3.45 Å. The Rb(2)-S(4) bond length is 3.34 Å. The Rb(2)-S(5) bond length is 3.47 Å. Both Rb(2)-S(1) bond lengths are 3.46 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to one S(1), one S(2), one S(4), and one S(5) atom to form corner-sharing TlS4 tetrahedra. The Tl(1)-S(1) bond length is 2.54 Å. The Tl(1)-S(2) bond length is 2.54 Å. The Tl(1)-S(4) bond length is 2.54 Å. The Tl(1)-S(5) bond length is 2.54 Å. In the second Tl site, Tl(2) is bonded to one S(1), one S(2), one S(3), and one S(4) atom to form corner-sharing TlS4 tetrahedra. The Tl(2)-S(1) bond length is 2.54 Å. The Tl(2)-S(2) bond length is 2.53 Å. The Tl(2)-S(3) bond length is 2.54 Å. The Tl(2)-S(4) bond length is 2.54 Å. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Tl(1), and one Tl(2) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Rb(1), one Rb(2), one Tl(1), and one Tl(2) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Tl(2) atoms. In the fourth S site, S(4) is bonded in a distorted rectangular see-saw-like geometry to one Rb(1), one Rb(2), one Tl(1), and one Tl(2) atom. In the fifth S site, S(5) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Tl(1) atoms.