DOI: 10.17188/1290334
title: Materials Data on Zr2N2O by Materials Project

description: Zr2ON2 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are eight inequivalent Zr4+ sites. In the first Zr4+ site, Zr4+ is bonded to four N3- and three O2- atoms to form distorted ZrN4O3 pentagonal bipyramids that share corners with two equivalent ZrN6O pentagonal bipyramids and edges with four ZrN4O3 pentagonal bipyramids. There are a spread of Zr–N bond distances ranging from 2.16–2.27 Å. There are one shorter (2.28 Å) and two longer (2.32 Å) Zr–O bond lengths. In the second Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to three N3- and five O2- atoms. There are one shorter (2.26 Å) and two longer (2.29 Å) Zr–N bond lengths. There are a spread of Zr–O bond distances ranging from 2.25–2.65 Å. In the third Zr4+ site, Zr4+ is bonded in a 7-coordinate geometry to five N3- and two equivalent O2- atoms. There are a spread of Zr–N bond distances ranging from 2.23–2.35 Å. Both Zr–O bond lengths are 2.34 Å. In the fourth Zr4+ site, Zr4+ is bonded to five N3- and two O2- atoms to form a mixture of distorted edge and corner-sharing ZrN5O2 pentagonal bipyramids. There are a spread of Zr–N bond distances ranging from 2.19–2.28 Å. There are one shorter (2.28 Å) and one longer (2.33 Å) Zr–O bond lengths. In the fifth Zr4+ site, Zr4+ is bonded to six N3- and one O2- atom to form distorted ZrN6O pentagonal bipyramids that share corners with two equivalent ZrN4O3 pentagonal bipyramids and edges with four ZrN5O2 pentagonal bipyramids. There are a spread of Zr–N bond distances ranging from 2.23–2.28 Å. The Zr–O bond length is 2.38 Å. In the sixth Zr4+ site, Zr4+ is bonded in a 8-coordinate geometry to six N3- and two equivalent O2- atoms. There are a spread of Zr–N bond distances ranging from 2.26–2.70 Å. Both Zr–O bond lengths are 2.31 Å. In the seventh Zr4+ site, Zr4+ is bonded in a 7-coordinate geometry to six N3- and one O2- atom. There are two shorter (2.29 Å) and four longer (2.32 Å) Zr–N bond lengths. The Zr–O bond length is 2.31 Å. In the eighth Zr4+ site, Zr4+ is bonded to five N3- and two O2- atoms to form distorted ZrN5O2 pentagonal bipyramids that share corners with two equivalent ZrN5O2 pentagonal bipyramids and edges with four ZrN4O3 pentagonal bipyramids. There are a spread of Zr–N bond distances ranging from 2.21–2.28 Å. There are one shorter (2.27 Å) and one longer (2.29 Å) Zr–O bond lengths. There are eight inequivalent N3- sites. In the first N3- site, N3- is bonded in a 5-coordinate geometry to five Zr4+ atoms. In the second N3- site, N3- is bonded in a 5-coordinate geometry to five Zr4+ atoms. In the third N3- site, N3- is bonded to five Zr4+ atoms to form a mixture of distorted edge and corner-sharing NZr5 square pyramids. In the fourth N3- site, N3- is bonded to five Zr4+ atoms to form a mixture of distorted edge and corner-sharing NZr5 trigonal bipyramids. In the fifth N3- site, N3- is bonded to five Zr4+ atoms to form distorted NZr5 square pyramids that share corners with two equivalent NZr5 square pyramids, corners with two equivalent OZr5 square pyramids, corners with four NZr5 trigonal bipyramids, edges with three NZr5 square pyramids, and an edgeedge with one NZr5 trigonal bipyramid. In the sixth N3- site, N3- is bonded in a 4-coordinate geometry to five Zr4+ atoms. In the seventh N3- site, N3- is bonded in a 5-coordinate geometry to five Zr4+ atoms. In the eighth N3- site, N3- is bonded to five Zr4+ atoms to form distorted NZr5 trigonal bipyramids that share corners with two equivalent NZr5 square pyramids, an edgeedge with one NZr5 square pyramid, edges with two equivalent OZr5 square pyramids, and edges with two equivalent NZr5 trigonal bipyramids. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to five Zr4+ atoms to form distorted OZr5 square pyramids that share corners with two equivalent NZr5 square pyramids, edges with two equivalent OZr5 square pyramids, and edges with two equivalent NZr5 trigonal bipyramids. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four Zr4+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to five Zr4+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to four Zr4+ atoms.