Materials Data on NaFeBP2O11 by Materials Project
NaFeBP2O11 crystallizes in the hexagonal P6_122 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 2.42–2.56 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 2.01–2.04 Å. B is bonded to four O atoms to form BO4 tetrahedra that share corners with four equivalent PO4 tetrahedra. All B–O bond lengths are 1.48 Å. P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with two equivalent BO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–50°. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. There are six inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to one B and one P atom. In the second O site, O is bonded in a bent 120 degrees geometry to two equivalent Na atoms. 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 water-like geometry to one Na and one Fe atom. In the fifth O site, O is bonded in a distorted bent 150 degrees geometry to one Fe and one P atom. In the sixth O site, O is bonded in a bent 120 degrees geometry to one B and one P atom.