Rb2U(OBr)4 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent Br(2), and three equivalent Br(1) atoms. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent Br(1), and two equivalent Br(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one U(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Rb(1) and one Br(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 4-coordinate geometry to three equivalent Rb(1) and one U(1) atom. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one U(1), and one O(2) atom.
Rb2U(OBr)4 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent Br(2), and three equivalent Br(1) atoms. There is one shorter (2.99 Å) and one longer (3.04 Å) Rb(1)-O(1) bond length. There is one shorter (3.09 Å) and one longer (3.12 Å) Rb(1)-O(2) bond length. There is one shorter (3.46 Å) and one longer (3.83 Å) Rb(1)-Br(2) bond length. There are a spread of Rb(1)-Br(1) bond distances ranging from 3.73-3.78 Å. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent Br(1), and two equivalent Br(2) atoms. Both U(1)-O(1) bond lengths are 1.82 Å. Both U(1)-Br(1) bond lengths are 2.80 Å. Both U(1)-Br(2) bond lengths are 2.88 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one U(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Rb(1) and one Br(2) atom. The O(2)-Br(2) bond length is 2.53 Å. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 4-coordinate geometry to three equivalent Rb(1) and one U(1) atom. In the second Br site, Br(2) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one U(1), and one O(2) atom.