Materials Data on Zn2Hg2H2Se2O11 by Materials Project
Hg2Zn2H2Se2O11 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a 2-coordinate geometry to six O2- atoms. There are a spread of Hg–O bond distances ranging from 2.13–2.76 Å. In the second Hg2+ site, Hg2+ is bonded in a distorted linear geometry to two O2- atoms. There are one shorter (2.08 Å) and one longer (2.10 Å) Hg–O bond lengths. Zn2+ is bonded to six O2- atoms to form ZnO6 octahedra that share a cornercorner with one ZnO6 octahedra, corners with three equivalent SeO4 tetrahedra, and an edgeedge with one ZnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Zn–O bond distances ranging from 2.07–2.27 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. Se6+ is bonded to four O2- atoms to form SeO4 tetrahedra that share corners with three equivalent ZnO6 octahedra. The corner-sharing octahedra tilt angles range from 44–46°. There is two shorter (1.67 Å) and two longer (1.68 Å) Se–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Hg2+, one Zn2+, and one Se6+ atom. In the second O2- site, O2- is bonded to two Hg2+ and two equivalent Zn2+ atoms to form a mixture of corner and edge-sharing OZn2Hg2 tetrahedra. In the third O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Zn2+ and two equivalent H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zn2+ and one Se6+ atom. In the fifth O2- site, O2- is bonded to two Hg2+ and two equivalent Zn2+ atoms to form a mixture of corner and edge-sharing OZn2Hg2 tetrahedra. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Zn2+ and one Se6+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Hg2+ and one Se6+ atom.