Materials Data on Na3WN3 by Materials Project
Na3WN3 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are six inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Na–N bond distances ranging from 2.44–2.73 Å. In the second Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.47–3.02 Å. In the third Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of Na–N bond distances ranging from 2.38–2.90 Å. In the fourth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Na–N bond distances ranging from 2.36–2.64 Å. In the fifth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Na–N bond distances ranging from 2.46–2.64 Å. In the sixth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four N3- atoms. There are a spread of Na–N bond distances ranging from 2.51–2.71 Å. There are two inequivalent W6+ sites. In the first W6+ site, W6+ is bonded to four N3- atoms to form corner-sharing WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.84–1.96 Å. In the second W6+ site, W6+ is bonded to four N3- atoms to form corner-sharing WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.84–1.96 Å. There are six inequivalent N3- sites. In the first N3- site, N3- is bonded in a 4-coordinate geometry to three Na1+ and two W6+ atoms. In the second N3- site, N3- is bonded in a 5-coordinate geometry to three Na1+ and two W6+ atoms. In the third N3- site, N3- is bonded in a 6-coordinate geometry to five Na1+ and one W6+ atom. In the fourth N3- site, N3- is bonded to five Na1+ and one W6+ atom to form a mixture of distorted corner and edge-sharing NNa5W octahedra. The corner-sharing octahedra tilt angles range from 49–55°. In the fifth N3- site, N3- is bonded in a 6-coordinate geometry to five Na1+ and one W6+ atom. In the sixth N3- site, N3- is bonded to five Na1+ and one W6+ atom to form a mixture of corner and edge-sharing NNa5W octahedra. The corner-sharing octahedra tilt angles range from 49–55°.