UCd3O6 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CdO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. In the second Cd site, Cd(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one U(1), one Cd(1), and two equivalent Cd(2) atoms to form distorted corner-sharing OUCd3 trigonal pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to one U(1), one Cd(1), and one Cd(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one U(1), one Cd(1), and one Cd(2) atom.
UCd3O6 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. Both U(1)-O(1) bond lengths are 2.16 Å. Both U(1)-O(2) bond lengths are 2.06 Å. Both U(1)-O(3) bond lengths are 2.06 Å. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CdO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. Both Cd(1)-O(1) bond lengths are 2.34 Å. Both Cd(1)-O(2) bond lengths are 2.34 Å. Both Cd(1)-O(3) bond lengths are 2.25 Å. In the second Cd site, Cd(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(1) atoms. The Cd(2)-O(2) bond length is 2.23 Å. The Cd(2)-O(3) bond length is 2.27 Å. There is one shorter (2.27 Å) and one longer (2.28 Å) Cd(2)-O(1) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded to one U(1), one Cd(1), and two equivalent Cd(2) atoms to form distorted corner-sharing OUCd3 trigonal pyramids. In the second O site, O(2) is bonded in a 3-coordinate geometry to one U(1), one Cd(1), and one Cd(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one U(1), one Cd(1), and one Cd(2) atom.