Cs2U(N2O7)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(6), and one O(7) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the second O site, O(7) is bonded in a single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1), one U(1), and one N(1) atom. In the fourth O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(3) is bonded in a single-bond geometry to two equivalent Cs(1) and one N(2) atom. In the sixth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one N(2) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one U(1), and one N(2) atom.
Cs2U(N2O7)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. The Cs(1)-O(1) bond length is 3.38 Å. The Cs(1)-O(4) bond length is 3.19 Å. There is one shorter (3.29 Å) and one longer (3.54 Å) Cs(1)-O(3) bond length. There is one shorter (3.32 Å) and one longer (3.35 Å) Cs(1)-O(5) bond length. There is one shorter (3.10 Å) and one longer (3.19 Å) Cs(1)-O(6) bond length. There is one shorter (3.21 Å) and one longer (3.23 Å) Cs(1)-O(7) bond length. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. Both U(1)-O(1) bond lengths are 2.42 Å. Both U(1)-O(2) bond lengths are 1.80 Å. Both U(1)-O(4) bond lengths are 2.55 Å. Both U(1)-O(5) bond lengths are 2.57 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(6), and one O(7) atom. The N(1)-O(1) bond length is 1.31 Å. The N(1)-O(6) bond length is 1.25 Å. The N(1)-O(7) bond length is 1.25 Å. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. The N(2)-O(3) bond length is 1.23 Å. The N(2)-O(4) bond length is 1.29 Å. The N(2)-O(5) bond length is 1.29 Å. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the second O site, O(7) is bonded in a single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to one Cs(1), one U(1), and one N(1) atom. In the fourth O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(3) is bonded in a single-bond geometry to two equivalent Cs(1) and one N(2) atom. In the sixth O site, O(4) is bonded in a distorted single-bond geometry to one Cs(1), one U(1), and one N(2) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one U(1), and one N(2) atom.