Materials Data on Na2FeBPO7 by Materials Project

Na2FeBPO7 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.26–2.87 Å. Fe is bonded to six O atoms to form FeO6 octahedra that share corners with four equivalent PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.99–2.07 Å. B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.34–1.39 Å. P is bonded to four O atoms to form PO4 tetrahedra that share corners with four equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 39–45°. There are a spread of P–O bond distances ranging from 1.54–1.57 Å. There are six inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two equivalent Na and one B atom. In the second O site, O is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na, one Fe, and one B atom. In the third O site, O is bonded in a distorted tetrahedral geometry to two equivalent Na, one Fe, and one B atom. In the fourth O site, O is bonded in a 3-coordinate geometry to one Na, one Fe, and one P atom. In the fifth O site, O is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na, one Fe, and one P atom. In the sixth O site, O is bonded in a 2-coordinate geometry to two equivalent Na, one Fe, and one P atom.