Materials Data on K2WS4 by Materials Project
K2WS4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of K–S bond distances ranging from 3.26–3.84 Å. In the second K1+ site, K1+ is bonded in a 5-coordinate geometry to five S2- atoms. There are a spread of K–S bond distances ranging from 3.19–3.60 Å. W6+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of W–S bond distances ranging from 2.19–2.21 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 4-coordinate geometry to three K1+ and one W6+ atom. In the second S2- site, S2- is bonded in a 5-coordinate geometry to four K1+ and one W6+ atom. In the third S2- site, S2- is bonded to four K1+ and one W6+ atom to form distorted corner-sharing SK4W square pyramids.