Materials Data on NaHSeO3 by Materials Project

Abstract

NaHSeO3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.41–2.51 Å. In the second Na1+ site, Na1+ is bonded to five O2- atoms to form distorted NaO5 trigonal bipyramids that share corners with three equivalent NaO6 octahedra, corners with two equivalent NaO5 trigonal bipyramids, and an edgeedge with one NaO6 octahedra. The corner-sharing octahedra tilt angles range from 62–80°. There are a spread of Na–O bond distances ranging from 2.35–2.69 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.60 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.70 Å) H–O bond length. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.69–1.86 Å. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.70–1.84 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Na1+ and one Se4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one H1+, and one Se4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one H1+, and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Na1+, one H1+, and one Se4+ atom. In the fifth O2- site, O2- is bonded to three Na1+ and one Se4+ atom to form distorted corner-sharing ONa3Se tetrahedra. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to two Na1+, one H1+, and one Se4+ atom.