Materials Data on Cs2AsH3SeO8 by Materials Project
Cs2AsH3SeO8 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 11-coordinate geometry to one H1+ and ten O2- atoms. The Cs–H bond length is 3.27 Å. There are a spread of Cs–O bond distances ranging from 3.15–3.64 Å. In the second Cs1+ site, Cs1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Cs–O bond distances ranging from 3.09–3.45 Å. As5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of As–O bond distances ranging from 1.66–1.78 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two equivalent O2- atoms. Both H–O bond lengths are 1.22 Å. In the second H1+ site, H1+ is bonded in a linear geometry to two equivalent O2- atoms. Both H–O bond lengths are 1.22 Å. In the third H1+ site, H1+ is bonded in a distorted linear geometry to one Cs1+ and two O2- atoms. There is one shorter (1.01 Å) and one longer (1.64 Å) H–O bond length. In the fourth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.57 Å) H–O bond length. Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.73 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Cs1+ and one As5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three Cs1+ and one Se6+ atom. In the third O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Cs1+, one As5+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cs1+, one H1+, and one Se6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one As5+, and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one H1+, and one Se6+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one As5+, and one H1+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Cs1+, one H1+, and one Se6+ atom.