Materials Data on ZnSiO3 by Materials Project

Abstract

ZnSiO3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to six O2- atoms to form distorted ZnO6 octahedra that share corners with six equivalent SiO4 tetrahedra and edges with two equivalent ZnO6 octahedra. There are a spread of Zn–O bond distances ranging from 2.00–2.48 Å. In the second Zn2+ site, Zn2+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are two shorter (1.94 Å) and two longer (2.06 Å) Zn–O bond lengths. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with three equivalent ZnO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 43–64°. There is one shorter (1.63 Å) and three longer (1.65 Å) Si–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Si4+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Zn2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Zn2+ and one Si4+ atom.