Materials Data on K2Sn(H2N)6 by Materials Project
K2Sn(NH2)6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to six equivalent N3- and three equivalent H1+ atoms. There are three shorter (2.87 Å) and three longer (2.99 Å) K–N bond lengths. All K–H bond lengths are 2.87 Å. Sn4+ is bonded in an octahedral geometry to six equivalent N3- atoms. All Sn–N bond lengths are 2.23 Å. N3- is bonded in a distorted water-like geometry to two equivalent K1+, one Sn4+, and two H1+ atoms. Both N–H bond lengths are 1.03 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one K1+ and one N3- atom.
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