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DOE OSTI2020

Materials Data on Fe5(OF4)2 by Materials Project

Fe5(OF4)2 is zeta iron carbide-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are five inequivalent Fe+2.40+ sites. In the first Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 39–58°. The Fe–O bond length is 1.84 Å. There are a spread of Fe–F bond distances ranging from 2.02–2.07 Å. In the second Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 46–59°. The Fe–O bond length is 2.08 Å. There are a spread of Fe–F bond distances ranging from 2.03–2.33 Å. In the third Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form a mixture of distorted edge and corner-sharing FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 31–64°. There is one shorter (1.81 Å) and one longer (2.01 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 1.99–2.37 Å. In the fourth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 46–56°. The Fe–O bond length is 2.02 Å. There are a spread of Fe–F bond distances ranging from 2.06–2.26 Å. In the fifth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 31–64°. The Fe–O bond length is 2.06 Å. There are a spread of Fe–F bond distances ranging from 2.07–2.23 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. There are eight inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the fifth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the sixth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the seventh F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the eighth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Fe5(OF4)2 by Materials Project

Fe5(OF4)2 is zeta iron carbide-derived structured and crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are six inequivalent Fe+2.40+ sites. In the first Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 47–56°. The Fe–O bond length is 2.03 Å. There are a spread of Fe–F bond distances ranging from 2.11–2.21 Å. In the second Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of corner and edge-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 35–67°. The Fe–O bond length is 1.98 Å. There are a spread of Fe–F bond distances ranging from 2.10–2.23 Å. In the third Fe+2.40+ site, Fe+2.40+ is bonded to two equivalent O2- and four F1- atoms to form a mixture of corner and edge-sharing FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 41–55°. Both Fe–O bond lengths are 1.89 Å. There are two shorter (2.02 Å) and two longer (2.27 Å) Fe–F bond lengths. In the fourth Fe+2.40+ site, Fe+2.40+ is bonded to two equivalent O2- and four F1- atoms to form a mixture of corner and edge-sharing FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 47–50°. Both Fe–O bond lengths are 1.94 Å. There are two shorter (2.01 Å) and two longer (2.11 Å) Fe–F bond lengths. In the fifth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of corner and edge-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 41–67°. The Fe–O bond length is 1.98 Å. There are a spread of Fe–F bond distances ranging from 2.07–2.28 Å. In the sixth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 35–56°. The Fe–O bond length is 1.91 Å. There are a spread of Fe–F bond distances ranging from 1.96–2.12 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. There are nine inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the third F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the fourth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fifth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the sixth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the seventh F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the eighth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the ninth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Fe5(OF4)2 by Materials Project

Fe5(OF4)2 is zeta iron carbide-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are ten inequivalent Fe+2.40+ sites. In the first Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 44–58°. The Fe–O bond length is 1.98 Å. There are a spread of Fe–F bond distances ranging from 2.07–2.26 Å. In the second Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 43–57°. There is one shorter (1.93 Å) and one longer (1.94 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 2.04–2.08 Å. In the third Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 43–55°. The Fe–O bond length is 1.98 Å. There are a spread of Fe–F bond distances ranging from 2.07–2.14 Å. In the fourth Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form a mixture of distorted edge and corner-sharing FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 41–58°. There is one shorter (1.82 Å) and one longer (1.94 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 2.05–2.30 Å. In the fifth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 47–58°. The Fe–O bond length is 2.03 Å. There are a spread of Fe–F bond distances ranging from 2.04–2.20 Å. In the sixth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 43–58°. The Fe–O bond length is 1.95 Å. There are a spread of Fe–F bond distances ranging from 2.10–2.18 Å. In the seventh Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 45–52°. The Fe–O bond length is 1.81 Å. There are a spread of Fe–F bond distances ranging from 2.01–2.14 Å. In the eighth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 49–58°. The Fe–O bond length is 1.95 Å. There are a spread of Fe–F bond distances ranging from 2.06–2.20 Å. In the ninth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 41–58°. The Fe–O bond length is 1.87 Å. There are a spread of Fe–F bond distances ranging from 1.98–2.14 Å. In the tenth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 44–57°. The Fe–O bond length is 2.04 Å. There are a spread of Fe–F bond distances ranging from 2.00–2.20 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. There are sixteen inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fifth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the sixth F1- site, F1- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the seventh F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the eighth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the ninth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the tenth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the eleventh F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the twelfth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the thirteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourteenth F1- site, F1- is bonded in a distorted T-shaped geometry to three Fe+2.40+ atoms. In the fifteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the sixteenth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Fe5(OF4)2 by Materials Project

Fe5(OF4)2 is zeta iron carbide-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are ten inequivalent Fe+2.40+ sites. In the first Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 44–54°. There is one shorter (1.89 Å) and one longer (2.03 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 1.99–2.15 Å. In the second Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 46–58°. The Fe–O bond length is 2.02 Å. There are a spread of Fe–F bond distances ranging from 2.07–2.23 Å. In the third Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeF6 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 44–56°. There is one shorter (1.88 Å) and one longer (1.98 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 2.02–2.17 Å. In the fourth Fe+2.40+ site, Fe+2.40+ is bonded to two O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeOF5 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 40–57°. There is one shorter (1.86 Å) and one longer (1.97 Å) Fe–O bond length. There are a spread of Fe–F bond distances ranging from 2.02–2.17 Å. In the fifth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 42–62°. The Fe–O bond length is 2.00 Å. There are a spread of Fe–F bond distances ranging from 2.10–2.22 Å. In the sixth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeF6 octahedra. The corner-sharing octahedra tilt angles range from 44–62°. The Fe–O bond length is 1.97 Å. There are a spread of Fe–F bond distances ranging from 2.08–2.25 Å. In the seventh Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 47–56°. The Fe–O bond length is 2.04 Å. There are a spread of Fe–F bond distances ranging from 2.09–2.18 Å. In the eighth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 46–59°. The Fe–O bond length is 1.96 Å. There are a spread of Fe–F bond distances ranging from 2.04–2.26 Å. In the ninth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeF6 octahedra. The corner-sharing octahedra tilt angles range from 42–57°. The Fe–O bond length is 1.92 Å. There are a spread of Fe–F bond distances ranging from 1.96–2.12 Å. In the tenth Fe+2.40+ site, Fe+2.40+ is bonded to six F1- atoms to form FeF6 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 40–56°. There are a spread of Fe–F bond distances ranging from 1.99–2.19 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the third O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. There are sixteen inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the second F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the fifth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the sixth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the seventh F1- site, F1- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the eighth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the ninth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the tenth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the eleventh F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the twelfth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the thirteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourteenth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms. In the fifteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the sixteenth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.40+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Fe5(OF4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗

DOE OSTI2020