Materials Data on FeP3O11 by Materials Project
FeP3O11 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 2.00–2.06 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 two equivalent FeO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 17–49°. There are a spread of P–O bond distances ranging from 1.49–1.64 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There is two shorter (1.50 Å) and two longer (1.63 Å) P–O bond length. There are six 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 water-like geometry to two equivalent O atoms. Both O–O bond lengths are 1.47 Å. In the third O site, O is bonded in a bent 120 degrees geometry to two P atoms. 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 distorted single-bond geometry to one P and one O atom. In the sixth O site, O is bonded in a distorted linear geometry to one Fe and one P atom.