Sm3Se4 crystallizes in the cubic I-43d space group. Sm(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted corner, face, and edge-sharing SmSe8 hexagonal bipyramids. Se(1) is bonded to six equivalent Sm(1) atoms to form a mixture of distorted corner, face, and edge-sharing SeSm6 octahedra. The corner-sharing octahedral tilt angles range from 18-49°.
Sm3Se4 crystallizes in the cubic I-43d space group. Sm(1) is bonded to eight equivalent Se(1) atoms to form a mixture of distorted corner, face, and edge-sharing SmSe8 hexagonal bipyramids. There are four shorter (2.96 Å) and four longer (3.16 Å) Sm(1)-Se(1) bond lengths. Se(1) is bonded to six equivalent Sm(1) atoms to form a mixture of distorted corner, face, and edge-sharing SeSm6 octahedra. The corner-sharing octahedral tilt angles range from 18-49°.