Pu3Se4 crystallizes in the tetragonal I-42d space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSe8 hexagonal bipyramids. In the second Pu site, Pu(2) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSe8 hexagonal bipyramids. Se(1) is bonded to two equivalent Pu(2) and four equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SePu6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.
Pu3Se4 crystallizes in the tetragonal I-42d space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSe8 hexagonal bipyramids. There are a spread of Pu(1)-Se(1) bond distances ranging from 2.97-3.16 Å. In the second Pu site, Pu(2) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted edge, face, and corner-sharing PuSe8 hexagonal bipyramids. There are four shorter (2.98 Å) and four longer (3.16 Å) Pu(2)-Se(1) bond lengths. Se(1) is bonded to two equivalent Pu(2) and four equivalent Pu(1) atoms to form a mixture of distorted edge, face, and corner-sharing SePu6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°.