Materials Data on K2SnN6 by Materials Project

Abstract

K2SnN6 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent N1- atoms to form KN12 cuboctahedra that share corners with twelve equivalent KN12 cuboctahedra, faces with six equivalent KN12 cuboctahedra, and faces with four equivalent SnN6 octahedra. There are six shorter (3.16 Å) and six longer (3.24 Å) K–N bond lengths. Sn4+ is bonded to six equivalent N1- atoms to form SnN6 octahedra that share faces with eight equivalent KN12 cuboctahedra. All Sn–N bond lengths are 2.17 Å. N1- is bonded in a distorted single-bond geometry to four equivalent K1+ and one Sn4+ atom.