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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on FePO4F by Materials Project

FePO4F crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent Fe sites. In the first Fe site, Fe is bonded to four O and two F atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There is two shorter (1.98 Å) and two longer (1.99 Å) Fe–O bond length. Both Fe–F bond lengths are 1.99 Å. In the second Fe site, Fe is bonded to four O and two F atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. All Fe–O bond lengths are 2.00 Å. Both Fe–F bond lengths are 1.97 Å. There are two inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 47–48°. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 41–48°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. There are eight inequivalent O sites. In the first O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. In the third O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. In the fourth O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. In the eighth O site, O is bonded in a distorted bent 120 degrees geometry to one Fe and one P atom. There are two inequivalent F sites. In the first F site, F is bonded in a bent 120 degrees geometry to two Fe atoms. In the second F site, F is bonded in a bent 120 degrees geometry to two Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FePO4F 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

Materials Data on FePNO4F by Materials Project

(FePO4F)2N2 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional and consists of eight ammonia molecules and one FePO4F framework. In the FePO4F framework, there are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to four O2- and two F1- atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–49°. There are a spread of Fe–O bond distances ranging from 1.97–2.00 Å. There are one shorter (1.99 Å) and one longer (2.01 Å) Fe–F bond lengths. In the second Fe3+ site, Fe3+ is bonded to four O2- and two F1- atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 48–49°. There are a spread of Fe–O bond distances ranging from 1.98–2.04 Å. Both Fe–F bond lengths are 1.97 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 40–46°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 44–46°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Fe3+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 120 degrees geometry to two Fe3+ atoms. In the second F1- site, F1- is bonded in a distorted bent 120 degrees geometry to two Fe3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FePH4NO4F by Materials Project

NH4FePO4F crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional and consists of eight ammonium molecules and one FePO4F framework. In the FePO4F framework, there are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to four O2- and two F1- atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are a spread of Fe–O bond distances ranging from 1.95–2.11 Å. There are one shorter (2.03 Å) and one longer (2.04 Å) Fe–F bond lengths. In the second Fe3+ site, Fe3+ is bonded to four O2- and two F1- atoms to form FeO4F2 octahedra that share corners with two equivalent FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are a spread of Fe–O bond distances ranging from 1.99–2.09 Å. There is one shorter (1.98 Å) and one longer (2.01 Å) Fe–F bond length. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 40–49°. There is three shorter (1.55 Å) and one longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 40–47°. There are a spread of P–O bond distances ranging from 1.55–1.57 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Fe3+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Fe3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Fe3+ and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 120 degrees geometry to two Fe3+ atoms. In the second F1- site, F1- is bonded in a bent 120 degrees geometry to two Fe3+ atoms.

36 MATERIALS SCIENCE↗