Materials Data on KEuPS4 by Materials Project
KEuPS4 crystallizes in the orthorhombic Pnma 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 3.35–3.56 Å. Eu2+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Eu–S bond distances ranging from 2.98–3.44 Å. P5+ is bonded in a tetrahedral geometry to four S2- atoms. There are a spread of P–S bond distances ranging from 2.04–2.07 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to three equivalent K1+, one Eu2+, and one P5+ atom to form distorted corner-sharing SK3EuP trigonal bipyramids. In the second S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent K1+, two equivalent Eu2+, and one P5+ atom. In the third S2- site, S2- is bonded in a 5-coordinate geometry to one K1+, three equivalent Eu2+, and one P5+ atom.