Rb2UBr5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. U(1) is bonded to one Br(1), one Br(2), one Br(3), and four equivalent Br(4) atoms to form distorted edge-sharing UBr7 pentagonal bipyramids. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of distorted edge, corner, and face-sharing BrRb4U trigonal bipyramids. In the second Br site, Br(2) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of distorted edge and corner-sharing BrRb4U trigonal bipyramids. In the third Br site, Br(3) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of edge, corner, and face-sharing BrRb4U trigonal bipyramids. In the fourth Br site, Br(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and two equivalent U(1) atoms.
Rb2UBr5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent Br(1), two equivalent Br(2), two equivalent Br(3), and two equivalent Br(4) atoms. There is one shorter (3.43 Å) and one longer (3.47 Å) Rb(1)-Br(1) bond length. There is one shorter (3.52 Å) and one longer (3.61 Å) Rb(1)-Br(2) bond length. There is one shorter (3.44 Å) and one longer (3.47 Å) Rb(1)-Br(3) bond length. There is one shorter (3.65 Å) and one longer (3.68 Å) Rb(1)-Br(4) bond length. U(1) is bonded to one Br(1), one Br(2), one Br(3), and four equivalent Br(4) atoms to form distorted edge-sharing UBr7 pentagonal bipyramids. The U(1)-Br(1) bond length is 2.95 Å. The U(1)-Br(2) bond length is 2.95 Å. The U(1)-Br(3) bond length is 2.99 Å. There are two shorter (3.03 Å) and two longer (3.04 Å) U(1)-Br(4) bond lengths. There are four inequivalent Br sites. In the first Br site, Br(1) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of distorted edge, corner, and face-sharing BrRb4U trigonal bipyramids. In the second Br site, Br(2) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of distorted edge and corner-sharing BrRb4U trigonal bipyramids. In the third Br site, Br(3) is bonded to four equivalent Rb(1) and one U(1) atom to form a mixture of edge, corner, and face-sharing BrRb4U trigonal bipyramids. In the fourth Br site, Br(4) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and two equivalent U(1) atoms.