Materials Data on K2SnN6 by Materials Project
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 a spread of K–N bond distances ranging from 3.17–3.22 Å. 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.
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