K2UC2H6SO13 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(5), one O(6), two equivalent O(11), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one H(6), one O(10), one O(11), one O(4), one O(5), two equivalent O(7), and two equivalent O(8) atoms. U(1) is bonded to one O(1), one O(12), one O(13), one O(2), one O(3), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one S(1)O4 tetrahedra. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(9) atom. There are six 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(8) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(10) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(10) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one K(2) and one O(8) atom. S(1) is bonded to one O(11), one O(4), one O(6), and one O(7) atom to form SO4 tetrahedra that share  a cornercorner with one U(1)O7 pentagonal bipyramid. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one K(1), one K(2), one H(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(2) and one S(1) atom. In the eighth O site, O(8) is bonded in a water-like geometry to two equivalent K(2), one H(2), and one H(6) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one U(1) and one C(2) atom. In the tenth O site, O(10) is bonded in a water-like geometry to one K(1), one K(2), one H(3), and one H(5) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one K(1), one U(1), and one C(2) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one U(1) atom.
K2UC2H6SO13 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(5), one O(6), two equivalent O(11), and two equivalent O(4) atoms. The K(1)-O(10) bond length is 2.81 Å. The K(1)-O(12) bond length is 3.21 Å. The K(1)-O(5) bond length is 2.82 Å. The K(1)-O(6) bond length is 3.14 Å. There is one shorter (2.70 Å) and one longer (3.06 Å) K(1)-O(11) bond length. There is one shorter (2.85 Å) and one longer (2.87 Å) K(1)-O(4) bond length. In the second K site, K(2) is bonded in a 9-coordinate geometry to one H(6), one O(10), one O(11), one O(4), one O(5), two equivalent O(7), and two equivalent O(8) atoms. The K(2)-H(6) bond length is 2.93 Å. The K(2)-O(10) bond length is 2.71 Å. The K(2)-O(11) bond length is 2.92 Å. The K(2)-O(4) bond length is 2.69 Å. The K(2)-O(5) bond length is 2.95 Å. There is one shorter (2.78 Å) and one longer (3.20 Å) K(2)-O(7) bond length. There is one shorter (2.85 Å) and one longer (3.08 Å) K(2)-O(8) bond length. U(1) is bonded to one O(1), one O(12), one O(13), one O(2), one O(3), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one S(1)O4 tetrahedra. The U(1)-O(1) bond length is 2.49 Å. The U(1)-O(12) bond length is 2.49 Å. The U(1)-O(13) bond length is 1.81 Å. The U(1)-O(2) bond length is 1.80 Å. The U(1)-O(3) bond length is 2.47 Å. The U(1)-O(6) bond length is 2.25 Å. The U(1)-O(9) bond length is 2.47 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(3) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(9) atom. The C(2)-O(12) bond length is 1.27 Å. The C(2)-O(9) bond length is 1.26 Å. There are six 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(8) atom. The H(2)-O(8) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(10) atom. The H(3)-O(10) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(5) atom. The H(4)-O(5) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(10) atom. The H(5)-O(10) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one K(2) and one O(8) atom. The H(6)-O(8) bond length is 0.99 Å. S(1) is bonded to one O(11), one O(4), one O(6), and one O(7) atom to form SO4 tetrahedra that share  a cornercorner with one U(1)O7 pentagonal bipyramid. The S(1)-O(11) bond length is 1.47 Å. The S(1)-O(4) bond length is 1.47 Å. The S(1)-O(6) bond length is 1.56 Å. The S(1)-O(7) bond length is 1.48 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one K(1), one K(2), one H(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one U(1), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(2) and one S(1) atom. In the eighth O site, O(8) is bonded in a water-like geometry to two equivalent K(2), one H(2), and one H(6) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one U(1) and one C(2) atom. In the tenth O site, O(10) is bonded in a water-like geometry to one K(1), one K(2), one H(3), and one H(5) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one K(1), one U(1), and one C(2) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one U(1) atom.