Materials Data on BaSe(SO2)4 by Materials Project

Abstract

BaS2O8Se(S)2 crystallizes in the orthorhombic Pnma space group. The structure is two-dimensional and consists of eight hydrogen sulfide molecules; four selenium molecules; and two BaS2O8 sheets oriented in the (0, 0, 1) direction. In each BaS2O8 sheet, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.75–2.91 Å. S2+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.46 Å) and one longer (1.47 Å) S–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one S2+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one S2+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+ atoms. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Ba2+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one S2+ atom.