Rb2S2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(4), one O(5), one O(7), one O(9), and two equivalent O(14) atoms. In the fourth Rb site, Rb(4) is bonded in a 10-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(6), one O(7), one O(8), one O(9), and two equivalent O(11) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SO4 tetrahedra. In the second S site, S(2) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form corner-sharing SO4 tetrahedra. In the third S site, S(3) is bonded to one O(12), one O(13), one O(8), and one O(9) atom to form corner-sharing SO4 tetrahedra. In the fourth S site, S(4) is bonded to one O(10), one O(11), one O(13), and one O(14) atom to form corner-sharing SO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(2), one S(1), and one S(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(4), and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), one Rb(4), and one S(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Rb(2), one Rb(4), and one S(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), one Rb(4), and one S(3) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Rb(2), one Rb(4), and one S(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(4), and one S(4) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Rb(3), one Rb(4), and one S(3) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Rb(4), one S(3), and one S(4) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Rb(4), two equivalent Rb(3), and one S(4) atom.
Rb2S2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. The Rb(1)-O(2) bond length is 3.02 Å. The Rb(1)-O(4) bond length is 2.95 Å. The Rb(1)-O(5) bond length is 2.98 Å. The Rb(1)-O(6) bond length is 3.01 Å. The Rb(1)-O(8) bond length is 3.43 Å. The Rb(1)-O(9) bond length is 3.03 Å. There is one shorter (2.96 Å) and one longer (3.06 Å) Rb(1)-O(3) bond length. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Rb(2)-O(1) bond length is 3.28 Å. The Rb(2)-O(10) bond length is 3.13 Å. The Rb(2)-O(11) bond length is 3.33 Å. The Rb(2)-O(2) bond length is 3.02 Å. The Rb(2)-O(3) bond length is 3.07 Å. The Rb(2)-O(5) bond length is 2.97 Å. The Rb(2)-O(6) bond length is 3.14 Å. The Rb(2)-O(7) bond length is 2.99 Å. The Rb(2)-O(8) bond length is 3.09 Å. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(4), one O(5), one O(7), one O(9), and two equivalent O(14) atoms. The Rb(3)-O(11) bond length is 3.08 Å. The Rb(3)-O(12) bond length is 3.05 Å. The Rb(3)-O(4) bond length is 3.20 Å. The Rb(3)-O(5) bond length is 3.00 Å. The Rb(3)-O(7) bond length is 3.17 Å. The Rb(3)-O(9) bond length is 3.04 Å. There is one shorter (2.96 Å) and one longer (2.97 Å) Rb(3)-O(14) bond length. In the fourth Rb site, Rb(4) is bonded in a 10-coordinate geometry to one O(10), one O(12), one O(13), one O(14), one O(6), one O(7), one O(8), one O(9), and two equivalent O(11) atoms. The Rb(4)-O(10) bond length is 3.14 Å. The Rb(4)-O(12) bond length is 2.89 Å. The Rb(4)-O(13) bond length is 2.95 Å. The Rb(4)-O(14) bond length is 3.06 Å. The Rb(4)-O(6) bond length is 3.01 Å. The Rb(4)-O(7) bond length is 3.37 Å. The Rb(4)-O(8) bond length is 3.14 Å. The Rb(4)-O(9) bond length is 3.12 Å. There is one shorter (3.49 Å) and one longer (3.50 Å) Rb(4)-O(11) bond length. There are four inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SO4 tetrahedra. The S(1)-O(1) bond length is 1.68 Å. The S(1)-O(3) bond length is 1.46 Å. The S(1)-O(4) bond length is 1.45 Å. The S(1)-O(5) bond length is 1.46 Å. In the second S site, S(2) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form corner-sharing SO4 tetrahedra. The S(2)-O(1) bond length is 1.69 Å. The S(2)-O(2) bond length is 1.46 Å. The S(2)-O(6) bond length is 1.46 Å. The S(2)-O(7) bond length is 1.46 Å. In the third S site, S(3) is bonded to one O(12), one O(13), one O(8), and one O(9) atom to form corner-sharing SO4 tetrahedra. The S(3)-O(12) bond length is 1.45 Å. The S(3)-O(13) bond length is 1.71 Å. The S(3)-O(8) bond length is 1.46 Å. The S(3)-O(9) bond length is 1.46 Å. In the fourth S site, S(4) is bonded to one O(10), one O(11), one O(13), and one O(14) atom to form corner-sharing SO4 tetrahedra. The S(4)-O(10) bond length is 1.46 Å. The S(4)-O(11) bond length is 1.46 Å. The S(4)-O(13) bond length is 1.68 Å. The S(4)-O(14) bond length is 1.46 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(2), one S(1), and one S(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(4), and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), one Rb(4), and one S(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Rb(2), one Rb(4), and one S(3) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(3), one Rb(4), and one S(3) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Rb(2), one Rb(4), and one S(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(4), and one S(4) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Rb(3), one Rb(4), and one S(3) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Rb(4), one S(3), and one S(4) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Rb(4), two equivalent Rb(3), and one S(4) atom.