Materials Data on Na2Zn3H4(Se2O7)2 by Materials Project
Na2Zn3H4(Se2O7)2 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of two Na2Zn3H4(Se2O7)2 sheets oriented in the (1, 0, 0) direction. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.85 Å. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded in a distorted trigonal bipyramidal geometry to five O2- atoms. There are a spread of Zn–O bond distances ranging from 2.01–2.36 Å. In the second Zn2+ site, Zn2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.05–2.45 Å. There are two 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 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. 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 1.69–1.79 Å. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.73 Å) and two longer (1.74 Å) Se–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+, one Zn2+, and one Se4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two H1+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Zn2+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Zn2+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, two Zn2+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+, one Zn2+, and one Se4+ atom. In the seventh O2- site, O2- is bonded in a T-shaped geometry to one Na1+, one Zn2+, and one Se4+ atom.