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.