CsU2H(C2O7)2 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing UO7 pentagonal bipyramids. 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(3) and one O(5) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(8) atom. H(1) is bonded in a single-bond geometry to one O(2) atom. There are eight inequivalent O sites. In the first O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the second O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one C(2) atom. In the third O site, O(8) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(2) atom. In the fourth O site, O(1) is bonded in a single-bond geometry to one Cs(1) and one U(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent U(1) and one H(1) atom. In the sixth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Cs(1) atoms. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one C(1) atom.
CsU2H(C2O7)2 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. Both Cs(1)-O(1) bond lengths are 3.41 Å. There is one shorter (3.38 Å) and one longer (3.50 Å) Cs(1)-O(4) bond length. Both Cs(1)-O(5) bond lengths are 3.19 Å. Both Cs(1)-O(7) bond lengths are 3.37 Å. U(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing UO7 pentagonal bipyramids. The U(1)-O(1) bond length is 1.81 Å. The U(1)-O(2) bond length is 2.32 Å. The U(1)-O(3) bond length is 2.45 Å. The U(1)-O(5) bond length is 2.47 Å. The U(1)-O(6) bond length is 1.80 Å. The U(1)-O(7) bond length is 2.46 Å. The U(1)-O(8) bond length is 2.44 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(3) and one O(5) atom. The C(1)-O(3) bond length is 1.26 Å. The C(1)-O(5) 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(7) and one O(8) atom. The C(2)-O(7) bond length is 1.27 Å. The C(2)-O(8) bond length is 1.26 Å. H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.97 Å. There are eight inequivalent O sites. In the first O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the second O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one C(2) atom. In the third O site, O(8) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(2) atom. In the fourth O site, O(1) is bonded in a single-bond geometry to one Cs(1) and one U(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent U(1) and one H(1) atom. In the sixth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one C(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to two equivalent Cs(1) atoms. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one C(1) atom.