U2TeSe is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to three equivalent Te(1) and three equivalent Se(1) atoms to form a mixture of edge and corner-sharing UTe3Se3 octahedra. The corner-sharing octahedra are not tilted. Te(1) is bonded to six equivalent U(1) atoms to form TeU6 octahedra that share corners with six equivalent Se(1)U6 octahedra, edges with six equivalent Te(1)U6 octahedra, and edges with six equivalent Se(1)U6 octahedra. The corner-sharing octahedral tilt angles are 6°. Se(1) is bonded to six equivalent U(1) atoms to form SeU6 octahedra that share corners with six equivalent Te(1)U6 octahedra, edges with six equivalent Te(1)U6 octahedra, and edges with six equivalent Se(1)U6 octahedra. The corner-sharing octahedral tilt angles are 6°.
U2TeSe is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to three equivalent Te(1) and three equivalent Se(1) atoms to form a mixture of edge and corner-sharing UTe3Se3 octahedra. The corner-sharing octahedra are not tilted. All U(1)-Te(1) bond lengths are 3.09 Å. All U(1)-Se(1) bond lengths are 2.87 Å. Te(1) is bonded to six equivalent U(1) atoms to form TeU6 octahedra that share corners with six equivalent Se(1)U6 octahedra, edges with six equivalent Te(1)U6 octahedra, and edges with six equivalent Se(1)U6 octahedra. The corner-sharing octahedral tilt angles are 6°. Se(1) is bonded to six equivalent U(1) atoms to form SeU6 octahedra that share corners with six equivalent Te(1)U6 octahedra, edges with six equivalent Te(1)U6 octahedra, and edges with six equivalent Se(1)U6 octahedra. The corner-sharing octahedral tilt angles are 6°.