Materials Data on K2SmAgCl6 by Materials Project

Abstract

K2SmAgCl6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent Cl1- atoms to form KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, faces with four equivalent SmCl6 octahedra, and faces with four equivalent AgCl6 octahedra. All K–Cl bond lengths are 3.83 Å. Sm3+ is bonded to six equivalent Cl1- atoms to form SmCl6 octahedra that share corners with six equivalent AgCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Sm–Cl bond lengths are 2.69 Å. Ag1+ is bonded to six equivalent Cl1- atoms to form AgCl6 octahedra that share corners with six equivalent SmCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–Cl bond lengths are 2.73 Å. Cl1- is bonded in a distorted linear geometry to four equivalent K1+, one Sm3+, and one Ag1+ atom.