Materials Data on Fe2O3 by Materials Project

Abstract

Fe2O3 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one Fe2O3 sheet oriented in the (1, 1, -1) direction. there are sixteen inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded in a 3-coordinate geometry to two Fe3+ and four O2- atoms. There are one shorter (2.07 Å) and one longer (2.08 Å) Fe–Fe bond lengths. There are a spread of Fe–O bond distances ranging from 2.01–2.55 Å. In the second Fe3+ site, Fe3+ is bonded in a 6-coordinate geometry to one Fe3+ and six O2- atoms. The Fe–Fe bond length is 2.05 Å. There are a spread of Fe–O bond distances ranging from 1.73–2.43 Å. In the third Fe3+ site, Fe3+ is bonded in a 3-coordinate geometry to two Fe3+ and five O2- atoms. The Fe–Fe bond length is 2.03 Å. There are a spread of Fe–O bond distances ranging from 2.01–2.54 Å. In the fourth Fe3+ site, Fe3+ is bonded in a distorted single-bond geometry to three O2- atoms. There are a spread of Fe–O bond distances ranging from 1.47–2.15 Å. In the fifth Fe3+ site, Fe3+ is bonded in a 3-coordinate geometry to five O2- atoms. There are a spread of Fe–O bond distances ranging from 1.50–2.22 Å. In the sixth Fe3+ site, Fe3+ is bonded in a 1-coordinate geometry to three O2- atoms. There are a spread of Fe–O bond distances ranging from 1.45–2.13 Å. In the seventh Fe3+ site, Fe3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Fe–O bond distances ranging from 1.80–2.25 Å. In the eighth Fe3+ site, Fe3+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Fe–O bond distances ranging from 1.87–2.16 Å. In the ninth Fe3+ site, Fe3+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Fe–O bond distances ranging from 1.52–2.18 Å. In the tenth Fe3+ site, Fe3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Fe–O bond distances ranging from 1.82–2.25 Å. In the eleventh Fe3+ site, Fe3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Fe–O bond distances ranging from 1.85–2.21 Å. In the twelfth Fe3+ site, Fe3+ is bonded in a 6-coordinate geometry to one Fe3+ and six O2- atoms. There are a spread of Fe–O bond distances ranging from 1.71–2.44 Å. In the thirteenth Fe3+ site, Fe3+ is bonded in a 2-coordinate geometry to two Fe3+ and eight O2- atoms. There are a spread of Fe–O bond distances ranging from 2.03–2.53 Å. In the fourteenth Fe3+ site, Fe3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Fe–O bond distances ranging from 1.74–2.11 Å. In the fifteenth Fe3+ site, Fe3+ is bonded in a hexagonal planar geometry to six O2- atoms. There are a spread of Fe–O bond distances ranging from 1.76–2.04 Å. In the sixteenth Fe3+ site, Fe3+ is bonded in a 8-coordinate geometry to six O2- atoms. There are a spread of Fe–O bond distances ranging from 1.84–2.22 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Fe3+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Fe3+ and one O2- atom. The O–O bond length is 2.17 Å. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Fe3+ atoms. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Fe3+ and one O2- atom. The O–O bond length is 2.32 Å. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ and one O2- atom. The O–O bond length is 2.30 Å. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to three Fe3+ and three O2- atoms. There are one shorter (2.12 Å) and one longer (2.21 Å) O–O bond lengths. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to three Fe3+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to four Fe3+ atoms. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Fe3+ and one O2- atom. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to four Fe3+ atoms. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Fe3+ atoms. In the seventeenth O2- site, O2- is bonded in a 3-coordinate geometry to three Fe3+ and one O2- atom. The O–O bond length is 2.36 Å. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Fe3+ and one O2- atom. The O–O bond length is 2.15 Å. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to three Fe3+ atoms. In the twentieth O2- site, O2- is bonded in a 1-coordinate geometry to four Fe3+ and three O2- atoms. The O–O bond length is 2.21 Å. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to three Fe3+ and one O2- atom. In the twenty-second O2- site, O2- is bonded in a 1-coordinate geometry to four Fe3+ and three O2- atoms. In the twenty-third O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to four Fe3+ atoms.