DOI: 10.17188/1677215
title: Materials Data on Na3AsH16(SO2)4 by Materials Project

description: Na3AsH16(SO2)4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two Na3AsH16(SO2)4 sheets oriented in the (0, 1, 0) direction. there are four inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a distorted square co-planar geometry to two equivalent S2- and four O2- atoms. Both Na–S bond lengths are 3.12 Å. There are two shorter (2.35 Å) and two longer (2.47 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded to two equivalent S2- and four O2- atoms to form distorted NaS2O4 octahedra that share corners with two equivalent AsS4 tetrahedra and edges with two equivalent NaO6 octahedra. Both Na–S bond lengths are 2.88 Å. There are two shorter (2.37 Å) and two longer (2.42 Å) Na–O bond lengths. In the third Na1+ site, Na1+ is bonded in a 6-coordinate geometry to one S2- and five O2- atoms. The Na–S bond length is 3.11 Å. There are a spread of Na–O bond distances ranging from 2.35–2.52 Å. In the fourth Na1+ site, Na1+ is bonded to six O2- atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.41–2.50 Å. As5+ is bonded to four S2- atoms to form AsS4 tetrahedra that share a cornercorner with one NaS2O4 octahedra. The corner-sharing octahedral tilt angles are 69°. There are a spread of As–S bond distances ranging from 2.17–2.21 Å. There are sixteen inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the ninth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the tenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the eleventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the twelfth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the thirteenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourteenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifteenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the sixteenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to one Na1+ and one As5+ atom. In the second S2- site, S2- is bonded in a water-like geometry to one Na1+ and one As5+ atom. In the third S2- site, S2- is bonded in a distorted bent 120 degrees geometry to one Na1+ and one As5+ atom. In the fourth S2- site, S2- is bonded in a single-bond geometry to one As5+ atom. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Na1+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to two Na1+ and two H1+ atoms. In the seventh O2- site, O2- is bonded in a distorted water-like geometry to one Na1+ and two H1+ atoms. In the eighth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Na1+ and two H1+ atoms.