Tb3Se4 crystallizes in the cubic I-43d space group. Tb(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted corner, edge, and face-sharing TbSe8 hexagonal bipyramids. Se(1) is bonded to six equivalent Tb(1) atoms to form a mixture of distorted corner, edge, and face-sharing SeTb6 octahedra. The corner-sharing octahedral tilt angles range from 18-49°.
Tb3Se4 crystallizes in the cubic I-43d space group. Tb(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted corner, edge, and face-sharing TbSe8 hexagonal bipyramids. There are four shorter (2.90 Å) and four longer (3.12 Å) Tb(1)-Se(1) bond lengths. Se(1) is bonded to six equivalent Tb(1) atoms to form a mixture of distorted corner, edge, and face-sharing SeTb6 octahedra. The corner-sharing octahedral tilt angles range from 18-49°.