Materials Data on Zr3N2O3 by Materials Project

Abstract

Zr3N2O3 crystallizes in the orthorhombic Cmc2_1 space group. The structure is three-dimensional. there are three inequivalent Zr4+ sites. In the first Zr4+ site, Zr4+ is bonded to two N3- and four O2- atoms to form a mixture of distorted edge and corner-sharing ZrN2O4 octahedra. The corner-sharing octahedra tilt angles range from 28–36°. There are one shorter (2.07 Å) and one longer (2.27 Å) Zr–N bond lengths. There are a spread of Zr–O bond distances ranging from 2.11–2.28 Å. In the second Zr4+ site, Zr4+ is bonded in a 6-coordinate geometry to three N3- and three O2- atoms. There are one shorter (2.07 Å) and two longer (2.16 Å) Zr–N bond lengths. There are a spread of Zr–O bond distances ranging from 2.07–2.53 Å. In the third Zr4+ site, Zr4+ is bonded to two N3- and four O2- atoms to form a mixture of distorted edge and corner-sharing ZrN2O4 octahedra. The corner-sharing octahedra tilt angles range from 28–42°. There are one shorter (2.12 Å) and one longer (2.22 Å) Zr–N bond lengths. There are a spread of Zr–O bond distances ranging from 2.10–2.28 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a 3-coordinate geometry to three Zr4+ atoms. In the second N3- site, N3- is bonded to four Zr4+ atoms to form distorted NZr4 tetrahedra that share corners with two equivalent NZr4 tetrahedra, a cornercorner with one OZr4 trigonal pyramid, and edges with two equivalent OZr4 trigonal pyramids. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to three Zr4+ atoms. In the second O2- site, O2- is bonded to four Zr4+ atoms to form distorted OZr4 trigonal pyramids that share a cornercorner with one NZr4 tetrahedra, corners with two equivalent OZr4 trigonal pyramids, and edges with two equivalent NZr4 tetrahedra. In the third O2- site, O2- is bonded in a 4-coordinate geometry to four Zr4+ atoms.