Materials Data on K2ScHgF6 by Materials Project

Abstract

K2ScHgF6 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, faces with four equivalent ScF6 octahedra, and faces with four equivalent HgF6 octahedra. All K–F bond lengths are 3.25 Å. Sc2+ is bonded to six equivalent F1- atoms to form ScF6 octahedra that share corners with six equivalent HgF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Sc–F bond lengths are 2.03 Å. Hg2+ is bonded to six equivalent F1- atoms to form HgF6 octahedra that share corners with six equivalent ScF6 octahedra and faces with eight equivalent KF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Hg–F bond lengths are 2.56 Å. F1- is bonded in a 2-coordinate geometry to four equivalent K1+, one Sc2+, and one Hg2+ atom.