K2OsBr6 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 Os(1)Br6 octahedra. Os(1) is bonded to six equivalent Br(1) atoms to form OsBr6 octahedra that share faces with eight equivalent K(1)Br12 cuboctahedra. Br(1) is bonded to four equivalent K(1) and one Os(1) atom to form a mixture of distorted edge, face, and corner-sharing BrK4Os square pyramids.
K2OsBr6 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 Os(1)Br6 octahedra. All K(1)-Br(1) bond lengths are 3.66 Å. Os(1) is bonded to six equivalent Br(1) atoms to form OsBr6 octahedra that share faces with eight equivalent K(1)Br12 cuboctahedra. All Os(1)-Br(1) bond lengths are 2.49 Å. Br(1) is bonded to four equivalent K(1) and one Os(1) atom to form a mixture of distorted edge, face, and corner-sharing BrK4Os square pyramids.