Materials Data on NaC2N3 by Materials Project
NaN(CN)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of Na–N bond distances ranging from 2.40–2.90 Å. In the second Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven N3- atoms. There are a spread of Na–N bond distances ranging from 2.57–2.90 Å. In the third Na1+ site, Na1+ is bonded to six N3- atoms to form distorted edge-sharing NaN6 octahedra. There are a spread of Na–N bond distances ranging from 2.42–3.02 Å. There are six inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.18 Å) and one longer (1.30 Å) C–N bond length. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of C–N bond distances ranging from 1.35–1.37 Å. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. All C–N bond lengths are 1.36 Å. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three N3- atoms. All C–N bond lengths are 1.36 Å. In the fifth C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.19 Å) and one longer (1.29 Å) C–N bond length. In the sixth C4+ site, C4+ is bonded in a linear geometry to two N3- atoms. There is one shorter (1.19 Å) and one longer (1.30 Å) C–N bond length. There are nine inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted bent 120 degrees geometry to two Na1+ and two C4+ atoms. In the second N3- site, N3- is bonded in a distorted bent 120 degrees geometry to two equivalent Na1+ and two C4+ atoms. In the third N3- site, N3- is bonded in a 4-coordinate geometry to three Na1+ and one C4+ atom. In the fourth N3- site, N3- is bonded in a 4-coordinate geometry to three equivalent Na1+ and one C4+ atom. In the fifth N3- site, N3- is bonded in a 2-coordinate geometry to one Na1+ and two C4+ atoms. In the sixth N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the seventh N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the eighth N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Na1+ and two C4+ atoms. In the ninth N3- site, N3- is bonded in a 3-coordinate geometry to two Na1+ and one C4+ atom.