U3Se4 crystallizes in the cubic I-43d space group. U(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, corner, and face-sharing USe8 hexagonal bipyramids. Se(1) is bonded to six equivalent U(1) atoms to form a mixture of distorted edge, corner, and face-sharing SeU6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.
U3Se4 crystallizes in the cubic I-43d space group. U(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, corner, and face-sharing USe8 hexagonal bipyramids. There are four shorter (2.99 Å) and four longer (3.14 Å) U(1)-Se(1) bond lengths. Se(1) is bonded to six equivalent U(1) atoms to form a mixture of distorted edge, corner, and face-sharing SeU6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.