K2NiF6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent F(1) atoms to form KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, and faces with four equivalent Ni(1)F6 octahedra. Ni(1) is bonded to six equivalent F(1) atoms to form NiF6 octahedra that share faces with eight equivalent K(1)F12 cuboctahedra. F(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one Ni(1) atom.
K2NiF6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent F(1) atoms to form KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, and faces with four equivalent Ni(1)F6 octahedra. All K(1)-F(1) bond lengths are 2.84 Å. Ni(1) is bonded to six equivalent F(1) atoms to form NiF6 octahedra that share faces with eight equivalent K(1)F12 cuboctahedra. All Ni(1)-F(1) bond lengths are 1.78 Å. F(1) is bonded in a distorted single-bond geometry to four equivalent K(1) and one Ni(1) atom.