Materials Data on Cs19(W2N5)6 by Materials Project

Abstract

Cs19(W2N5)6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are four inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to two equivalent N3- atoms. There are one shorter (3.09 Å) and one longer (3.11 Å) Cs–N bond lengths. In the second Cs1+ site, Cs1+ is bonded in a 2-coordinate geometry to two equivalent N3- atoms. There are one shorter (3.10 Å) and one longer (3.17 Å) Cs–N bond lengths. In the third Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven N3- atoms. There are a spread of Cs–N bond distances ranging from 3.29–3.63 Å. In the fourth Cs1+ site, Cs1+ is bonded in a hexagonal planar geometry to six equivalent N3- atoms. All Cs–N bond lengths are 3.14 Å. There are two inequivalent W+5.92+ sites. In the first W+5.92+ site, W+5.92+ is bonded to four N3- atoms to form corner-sharing WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.79–1.92 Å. In the second W+5.92+ site, W+5.92+ is bonded to four N3- atoms to form corner-sharing WN4 tetrahedra. There are a spread of W–N bond distances ranging from 1.80–1.92 Å. There are five inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted linear geometry to two Cs1+ and two equivalent W+5.92+ atoms. In the second N3- site, N3- is bonded in a distorted linear geometry to one Cs1+ and two equivalent W+5.92+ atoms. In the third N3- site, N3- is bonded in a 1-coordinate geometry to four Cs1+ and one W+5.92+ atom. In the fourth N3- site, N3- is bonded in a 1-coordinate geometry to four Cs1+ and one W+5.92+ atom. In the fifth N3- site, N3- is bonded in a distorted linear geometry to one Cs1+ and two W+5.92+ atoms.