Materials Data on K(Nb3S4)2 by Materials Project

Abstract

K(Nb3S4)2 crystallizes in the trigonal P-3 space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six equivalent S2- atoms. All K–S bond lengths are 3.23 Å. Nb+2.50+ is bonded to six S2- atoms to form a mixture of edge, face, and corner-sharing NbS6 octahedra. The corner-sharing octahedra tilt angles range from 44–54°. There are a spread of Nb–S bond distances ranging from 2.48–2.69 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to one K1+ and four equivalent Nb+2.50+ atoms. In the second S2- site, S2- is bonded to six equivalent Nb+2.50+ atoms to form distorted face-sharing SNb6 pentagonal pyramids.