RbUCrO10I crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. U(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent Cr(1)O4 tetrahedra. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(1), one U(1), and one Cr(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one U(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Rb(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Rb(1), one U(1), and one I(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one U(1) and one I(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one I(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1) and one U(1) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Rb(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one U(1) atom. I(1) is bonded in a 3-coordinate geometry to one O(5), one O(6), and one O(7) atom.
RbUCrO10I crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. The Rb(1)-O(1) bond length is 3.46 Å. The Rb(1)-O(3) bond length is 2.89 Å. The Rb(1)-O(4) bond length is 3.02 Å. The Rb(1)-O(5) bond length is 3.13 Å. The Rb(1)-O(8) bond length is 3.35 Å. The Rb(1)-O(9) bond length is 3.13 Å. There is one shorter (2.92 Å) and one longer (2.99 Å) Rb(1)-O(7) bond length. U(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent Cr(1)O4 tetrahedra. The U(1)-O(1) bond length is 2.42 Å. The U(1)-O(10) bond length is 1.82 Å. The U(1)-O(2) bond length is 2.34 Å. The U(1)-O(5) bond length is 2.42 Å. The U(1)-O(6) bond length is 2.42 Å. The U(1)-O(8) bond length is 2.34 Å. The U(1)-O(9) bond length is 1.82 Å. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. The Cr(1)-O(1) bond length is 1.73 Å. The Cr(1)-O(2) bond length is 1.72 Å. The Cr(1)-O(3) bond length is 1.62 Å. The Cr(1)-O(4) bond length is 1.62 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(1), one U(1), and one Cr(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one U(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Rb(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Rb(1), one U(1), and one I(1) atom. The O(5)-I(1) bond length is 1.87 Å. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one U(1) and one I(1) atom. The O(6)-I(1) bond length is 1.86 Å. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Rb(1) and one I(1) atom. The O(7)-I(1) bond length is 1.80 Å. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1) and one U(1) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one Rb(1) and one U(1) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one U(1) atom. I(1) is bonded in a 3-coordinate geometry to one O(5), one O(6), and one O(7) atom.