Materials Data on Na2SO4 by Materials Project

Abstract

Na2SO4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a distorted trigonal bipyramidal geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.28–2.70 Å. In the second Na1+ site, Na1+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.23–2.86 Å. In the third Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.81 Å. In the fourth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–3.01 Å. There are two inequivalent S6+ sites. In the first S6+ site, S6+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of S–O bond distances ranging from 1.52–1.56 Å. In the second S6+ site, S6+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.52 Å) and two longer (1.54 Å) S–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Na1+ and one S6+ atom. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Na1+ and one O2- atom. The O–O bond length is 1.27 Å. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to two Na1+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three Na1+ and one S6+ atom. In the fifth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form corner-sharing ONa3S tetrahedra. In the sixth O2- site, O2- is bonded to three Na1+ and one S6+ atom to form distorted corner-sharing ONa3S tetrahedra. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Na1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Na1+ and one O2- atom.