Sn3Se is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sn(1) is bonded to eight equivalent Sn(1) and four equivalent Se(1) atoms to form distorted SnSn8Se4 cuboctahedra that share corners with twelve equivalent Sn(1)Sn8Se4 cuboctahedra, edges with eight equivalent Se(1)Sn12 cuboctahedra, edges with sixteen equivalent Sn(1)Sn8Se4 cuboctahedra, faces with four equivalent Se(1)Sn12 cuboctahedra, and faces with fourteen equivalent Sn(1)Sn8Se4 cuboctahedra. Se(1) is bonded to twelve equivalent Sn(1) atoms to form distorted SeSn12 cuboctahedra that share corners with twelve equivalent Se(1)Sn12 cuboctahedra, edges with twenty-four equivalent Sn(1)Sn8Se4 cuboctahedra, faces with six equivalent Se(1)Sn12 cuboctahedra, and faces with twelve equivalent Sn(1)Sn8Se4 cuboctahedra.
Sn3Se is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sn(1) is bonded to eight equivalent Sn(1) and four equivalent Se(1) atoms to form distorted SnSn8Se4 cuboctahedra that share corners with twelve equivalent Sn(1)Sn8Se4 cuboctahedra, edges with eight equivalent Se(1)Sn12 cuboctahedra, edges with sixteen equivalent Sn(1)Sn8Se4 cuboctahedra, faces with four equivalent Se(1)Sn12 cuboctahedra, and faces with fourteen equivalent Sn(1)Sn8Se4 cuboctahedra. All Sn(1)-Sn(1) bond lengths are 3.35 Å. All Sn(1)-Se(1) bond lengths are 3.35 Å. Se(1) is bonded to twelve equivalent Sn(1) atoms to form distorted SeSn12 cuboctahedra that share corners with twelve equivalent Se(1)Sn12 cuboctahedra, edges with twenty-four equivalent Sn(1)Sn8Se4 cuboctahedra, faces with six equivalent Se(1)Sn12 cuboctahedra, and faces with twelve equivalent Sn(1)Sn8Se4 cuboctahedra.