K2SeBr6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent Br(1) atoms to form KBr12 cuboctahedra that share corners with twelve equivalent K(1)Br12 cuboctahedra, faces with six equivalent K(1)Br12 cuboctahedra, and faces with four equivalent Se(1)Br6 octahedra. Se(1) is bonded to six equivalent Br(1) atoms to form SeBr6 octahedra that share faces with eight equivalent K(1)Br12 cuboctahedra. Br(1) is bonded to four equivalent K(1) and one Se(1) atom to form a mixture of corner, edge, and face-sharing BrK4Se square pyramids.
K2SeBr6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent Br(1) atoms to form KBr12 cuboctahedra that share corners with twelve equivalent K(1)Br12 cuboctahedra, faces with six equivalent K(1)Br12 cuboctahedra, and faces with four equivalent Se(1)Br6 octahedra. All K(1)-Br(1) bond lengths are 3.71 Å. Se(1) is bonded to six equivalent Br(1) atoms to form SeBr6 octahedra that share faces with eight equivalent K(1)Br12 cuboctahedra. All Se(1)-Br(1) bond lengths are 2.58 Å. Br(1) is bonded to four equivalent K(1) and one Se(1) atom to form a mixture of corner, edge, and face-sharing BrK4Se square pyramids.