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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Na2Fe2P2O8F by Materials Project

Na2Fe2P2O8F crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Na1+ is bonded to five O2- and one F1- atom to form distorted NaO5F pentagonal pyramids that share corners with two equivalent NaO5F pentagonal pyramids, corners with three equivalent PO4 tetrahedra, corners with two equivalent FeO4F trigonal bipyramids, an edgeedge with one NaO5F pentagonal pyramid, an edgeedge with one PO4 tetrahedra, an edgeedge with one FeO4F trigonal bipyramid, and a faceface with one NaO5F pentagonal pyramid. There are a spread of Na–O bond distances ranging from 2.38–2.79 Å. The Na–F bond length is 2.46 Å. Fe+2.50+ is bonded to four O2- and one F1- atom to form distorted FeO4F trigonal bipyramids that share corners with two equivalent NaO5F pentagonal pyramids, corners with four equivalent PO4 tetrahedra, an edgeedge with one NaO5F pentagonal pyramid, and a faceface with one FeO4F trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.95–2.09 Å. The Fe–F bond length is 2.10 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent NaO5F pentagonal pyramids, corners with four equivalent FeO4F trigonal bipyramids, and an edgeedge with one NaO5F pentagonal pyramid. There are a spread of P–O bond distances ranging from 1.51–1.60 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Na1+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Fe+2.50+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Fe+2.50+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Fe+2.50+, and one P5+ atom. F1- is bonded in a rectangular see-saw-like geometry to two equivalent Na1+ and two equivalent Fe+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaFeP2(O3F)2 by Materials Project

NaFeP2(O3F)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded in a 5-coordinate geometry to four O2- and one F1- atom. There are a spread of Na–O bond distances ranging from 2.30–2.53 Å. The Na–F bond length is 2.29 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO3F tetrahedra. There are a spread of Fe–O bond distances ranging from 1.98–2.12 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to three O2- and one F1- atom to form PO3F tetrahedra that share corners with three equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 24–47°. There are a spread of P–O bond distances ranging from 1.51–1.54 Å. The P–F bond length is 1.60 Å. In the second P5+ site, P5+ is bonded to three O2- and one F1- atom to form PO3F tetrahedra that share corners with three equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 33–49°. There is one shorter (1.52 Å) and two longer (1.53 Å) P–O bond length. The P–F bond length is 1.59 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Na1+, one Fe3+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, 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 bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Fe3+, and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Na1+ and one P5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na8Fe6P6(O8F3)3 by Materials Project

Na8Fe6P6(O8F3)3 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Na sites. In the first Na site, Na is bonded in a 7-coordinate geometry to four O and three F atoms. There are two shorter (2.42 Å) and two longer (2.44 Å) Na–O bond lengths. There are a spread of Na–F bond distances ranging from 2.36–2.54 Å. In the second Na site, Na is bonded in a 7-coordinate geometry to four O and three F atoms. There are two shorter (2.58 Å) and two longer (2.59 Å) Na–O bond lengths. There are two shorter (2.41 Å) and one longer (2.64 Å) Na–F bond lengths. In the third Na site, Na is bonded in a 7-coordinate geometry to four O and three F atoms. There are a spread of Na–O bond distances ranging from 2.39–2.69 Å. There are a spread of Na–F bond distances ranging from 2.49–2.57 Å. There are three inequivalent Fe sites. In the first Fe site, Fe is bonded to four O and two F atoms to form FeO4F2 octahedra that share a cornercorner with one FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 5°. There are two shorter (2.01 Å) and two longer (2.07 Å) Fe–O bond lengths. There is one shorter (1.90 Å) and one longer (2.03 Å) Fe–F bond length. In the second Fe site, Fe is bonded to four O and two F atoms to form FeO4F2 octahedra that share a cornercorner with one FeO4F2 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 0°. All Fe–O bond lengths are 2.01 Å. There are one shorter (1.96 Å) and one longer (2.04 Å) Fe–F bond lengths. In the third Fe site, Fe is bonded to four O and two F atoms to form FeO4F2 octahedra that share a cornercorner with one FeO4F2 octahedra and corners with four equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 5°. There are two shorter (2.00 Å) and two longer (2.04 Å) Fe–O bond lengths. There is one shorter (1.95 Å) and one longer (2.04 Å) Fe–F bond length. 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 43–46°. There is one shorter (1.54 Å) and three 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 43–45°. All P–O bond lengths are 1.55 Å. There are six inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. In the second O site, O is bonded in a 4-coordinate geometry to two Na, one Fe, and one P atom. In the third O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. In the fourth O site, O is bonded in a 4-coordinate geometry to two Na, one Fe, and one P atom. In the fifth O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. There are five inequivalent F sites. In the first F site, F is bonded in a 4-coordinate geometry to three Na and one Fe atom. In the second F site, F is bonded in a 4-coordinate geometry to three Na and one Fe atom. In the third F site, F is bonded in a distorted square pyramidal geometry to three Na and two Fe atoms. In the fourth F site, F is bonded in a square co-planar geometry to two equivalent Na and two equivalent Fe atoms. In the fifth F site, F is bonded in a distorted trigonal planar geometry to two equivalent Na and one Fe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3Fe2P2O10F by Materials Project

Na3Fe2P2O10F crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. there are three inequivalent Na sites. In the first Na site, Na is bonded in a 7-coordinate geometry to six O and one F atom. There are a spread of Na–O bond distances ranging from 2.35–2.56 Å. The Na–F bond length is 2.53 Å. In the second Na site, Na is bonded in a 7-coordinate geometry to six O and one F atom. There are a spread of Na–O bond distances ranging from 2.36–2.55 Å. The Na–F bond length is 2.44 Å. In the third Na site, Na is bonded in a distorted square co-planar geometry to four O and one F atom. There are two shorter (2.37 Å) and two longer (2.44 Å) Na–O bond lengths. The Na–F bond length is 2.86 Å. Fe is bonded to five O and one F atom to form distorted FeO5F octahedra that share a cornercorner with one FeO5F octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 3°. There are a spread of Fe–O bond distances ranging from 1.73–2.10 Å. The Fe–F bond length is 2.03 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 equivalent FeO5F octahedra. The corner-sharing octahedral tilt angles are 47°. 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 equivalent FeO5F octahedra. The corner-sharing octahedral tilt angles are 47°. All P–O bond lengths are 1.55 Å. There are five inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. In the second O site, O is bonded in a distorted trigonal planar geometry to one Na, one Fe, and one P atom. In the third O site, O is bonded in a distorted rectangular see-saw-like geometry to two Na, one Fe, and one P atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Na, one Fe, and one P atom. In the fifth O site, O is bonded in a 1-coordinate geometry to three Na and one Fe atom. F is bonded in a 4-coordinate geometry to three Na and two equivalent Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na7Fe7P6(O8F)3 by Materials Project

Na7Fe7(PO4)6F3 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are seven inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–3.03 Å. In the second Na1+ site, Na1+ is bonded in a 4-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–3.02 Å. In the third Na1+ site, Na1+ is bonded in a 4-coordinate geometry to nine O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–3.03 Å. In the fourth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to three O2- and three F1- atoms. There are one shorter (2.47 Å) and two longer (2.48 Å) Na–O bond lengths. All Na–F bond lengths are 2.40 Å. In the fifth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to four O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.73 Å. There are one shorter (2.25 Å) and one longer (2.57 Å) Na–F bond lengths. In the sixth Na1+ site, Na1+ is bonded in a 6-coordinate geometry to four O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.72 Å. There are one shorter (2.25 Å) and one longer (2.57 Å) Na–F bond lengths. In the seventh Na1+ site, Na1+ is bonded in a 6-coordinate geometry to four O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.73 Å. There are one shorter (2.25 Å) and one longer (2.57 Å) Na–F bond lengths. There are seven inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.03–2.33 Å. The Fe–F bond length is 2.21 Å. In the second Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.03–2.33 Å. The Fe–F bond length is 2.21 Å. In the third Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.03–2.33 Å. The Fe–F bond length is 2.20 Å. In the fourth Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.05–2.33 Å. The Fe–F bond length is 2.15 Å. In the fifth Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.05–2.33 Å. The Fe–F bond length is 2.15 Å. In the sixth Fe2+ site, Fe2+ is bonded to five O2- and one F1- atom to form FeO5F octahedra that share corners with five PO4 tetrahedra and edges with two equivalent FeO5F octahedra. There are a spread of Fe–O bond distances ranging from 2.05–2.34 Å. The Fe–F bond length is 2.15 Å. In the seventh Fe2+ site, Fe2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are four shorter (2.31 Å) and two longer (2.32 Å) Fe–O bond lengths. There are six inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO5F octahedra. The corner-sharing octahedra tilt angles range from 45–52°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO5F octahedra. The corner-sharing octahedra tilt angles range from 45–51°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO5F octahedra. The corner-sharing octahedra tilt angles range from 45–52°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six FeO5F octahedra. The corner-sharing octahedra tilt angles range from 44–53°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six FeO5F octahedra. The corner-sharing octahedra tilt angles range from 43–53°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six FeO5F octahedra. The corner-sharing octahedra tilt angles range from 44–53°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Fe2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Fe2+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Fe2+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Fe2+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Fe2+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Fe2+, and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two equivalent Fe2+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two equivalent Fe2+, and one P5+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two equivalent Fe2+, and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the seventeenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the twentieth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, two Fe2+, and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to two Na1+, one Fe2+, and one P5+ atom. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 5-coordinate geometry to three Na1+ and two Fe2+ atoms. In the second F1- site, F1- is bonded in a 5-coordinate geometry to three Na1+ and two Fe2+ atoms. In the third F1- site, F1- is bonded in a 5-coordinate geometry to three Na1+ and two Fe2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2FePO4F by Materials Project

Na2FePO4F crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to four O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.39–2.49 Å. There are one shorter (2.38 Å) and one longer (2.55 Å) Na–F bond lengths. In the second Na1+ site, Na1+ is bonded in a 7-coordinate geometry to five O2- and two F1- atoms. There are a spread of Na–O bond distances ranging from 2.32–2.84 Å. There are one shorter (2.36 Å) and one longer (2.44 Å) Na–F bond lengths. Fe2+ is bonded to four O2- and two F1- atoms to form distorted FeO4F2 octahedra that share a cornercorner with one FeO4F2 octahedra, corners with four equivalent PO4 tetrahedra, and a faceface with one FeO4F2 octahedra. The corner-sharing octahedral tilt angles are 74°. There are a spread of Fe–O bond distances ranging from 2.07–2.21 Å. There are one shorter (2.13 Å) and one longer (2.20 Å) Fe–F bond lengths. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 40–53°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Na1+, one Fe2+, and one P5+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Na1+ and one P5+ atom. In the third O2- site, O2- is bonded to two Na1+, one Fe2+, and one P5+ atom to form distorted ONa2FeP tetrahedra that share corners with six FNa4Fe2 octahedra. The corner-sharing octahedra tilt angles range from 6–70°. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Na1+, two equivalent Fe2+, and one P5+ atom. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to four Na1+ and two equivalent Fe2+ atoms to form FNa4Fe2 octahedra that share corners with six equivalent ONa2FeP tetrahedra and faces with two equivalent FNa4Fe2 octahedra. In the second F1- site, F1- is bonded to four Na1+ and two equivalent Fe2+ atoms to form distorted FNa4Fe2 octahedra that share corners with six equivalent ONa2FeP tetrahedra and faces with two equivalent FNa4Fe2 octahedra.

36 MATERIALS SCIENCE↗