Materials Data on HS2IO8 by Materials Project
HS2O8I crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two HS2O8I sheets oriented in the (1, 0, 0) direction. H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.69 Å) H–O bond length. There are two inequivalent S5+ sites. In the first S5+ site, S5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.43–1.62 Å. In the second S5+ site, S5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of S–O bond distances ranging from 1.42–1.61 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one S5+ and one I5+ atom. The O–I bond length is 2.36 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one S5+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one S5+ and one I5+ atom. The O–I bond length is 2.02 Å. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one S5+ and one I5+ atom. The O–I bond length is 2.44 Å. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one S5+ and one I5+ atom. The O–I bond length is 2.04 Å. In the sixth O2- site, O2- is bonded in a single-bond geometry to one S5+ atom. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one H1+ and one S5+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one H1+ and one S5+ atom. I5+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms.