K2U3(O5I)4 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), one O(6), and two equivalent O(9) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(5), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form distorted edge-sharing UO7 pentagonal bipyramids. In the second U site, U(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one K(1), one U(2), and two equivalent U(1) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one U(1) and one I(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one U(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one I(1), and one I(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one U(1), one U(2), and one I(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one U(1) and one I(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one I(1), and one I(2) atom. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(10), one O(3), one O(6), and one O(8) atom. In the second I site, I(2) is bonded in a distorted see-saw-like geometry to one O(10), one O(2), one O(6), and one O(7) atom.
K2U3(O5I)4 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), one O(6), and two equivalent O(9) atoms. The K(1)-O(1) bond length is 3.21 Å. The K(1)-O(10) bond length is 3.00 Å. The K(1)-O(3) bond length is 2.72 Å. The K(1)-O(4) bond length is 2.79 Å. The K(1)-O(5) bond length is 2.79 Å. The K(1)-O(6) bond length is 2.72 Å. There is one shorter (2.78 Å) and one longer (2.82 Å) K(1)-O(9) bond length. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(5), one O(7), one O(8), one O(9), and two equivalent O(1) atoms to form distorted edge-sharing UO7 pentagonal bipyramids. The U(1)-O(2) bond length is 2.34 Å. The U(1)-O(5) bond length is 1.82 Å. The U(1)-O(7) bond length is 2.40 Å. The U(1)-O(8) bond length is 2.39 Å. The U(1)-O(9) bond length is 1.82 Å. There is one shorter (2.26 Å) and one longer (2.27 Å) U(1)-O(1) bond length. In the second U site, U(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. Both U(2)-O(1) bond lengths are 2.21 Å. Both U(2)-O(4) bond lengths are 1.82 Å. Both U(2)-O(7) bond lengths are 2.46 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one K(1), one U(2), and two equivalent U(1) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one U(1) and one I(2) atom. The O(2)-I(2) bond length is 1.82 Å. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1) and one I(1) atom. The O(3)-I(1) bond length is 1.81 Å. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one U(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one I(1), and one I(2) atom. The O(6)-I(1) bond length is 2.64 Å. The O(6)-I(2) bond length is 1.79 Å. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one U(1), one U(2), and one I(2) atom. The O(7)-I(2) bond length is 1.87 Å. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one U(1) and one I(1) atom. The O(8)-I(1) bond length is 1.83 Å. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one K(1), one I(1), and one I(2) atom. The O(10)-I(1) bond length is 1.83 Å. The O(10)-I(2) bond length is 2.33 Å. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(10), one O(3), one O(6), and one O(8) atom. In the second I site, I(2) is bonded in a distorted see-saw-like geometry to one O(10), one O(2), one O(6), and one O(7) atom.