Materials Data on KEuAsS3 by Materials Project
KEuAsS3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.27–3.80 Å. Eu2+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of Eu–S bond distances ranging from 2.94–3.32 Å. As3+ is bonded in a trigonal non-coplanar geometry to three S2- atoms. There are a spread of As–S bond distances ranging from 2.25–2.32 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 2-coordinate geometry to four equivalent K1+, one Eu2+, and one As3+ atom. In the second S2- site, S2- is bonded in a 6-coordinate geometry to one K1+, four equivalent Eu2+, and one As3+ atom. In the third S2- site, S2- is bonded in a 6-coordinate geometry to three equivalent K1+, two equivalent Eu2+, and one As3+ atom.