Materials Data on K2CoF6 by Materials Project
K2CoF6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent F1- atoms to form KF12 cuboctahedra that share corners with twelve equivalent KF12 cuboctahedra, faces with six equivalent KF12 cuboctahedra, and faces with four equivalent CoF6 octahedra. All K–F bond lengths are 2.97 Å. Co4+ is bonded to six equivalent F1- atoms to form CoF6 octahedra that share faces with eight equivalent KF12 cuboctahedra. All Co–F bond lengths are 1.87 Å. F1- is bonded in a distorted single-bond geometry to four equivalent K1+ and one Co4+ atom.
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