Materials Data on Mn2Fe(PO4)3 by Materials Project

Abstract

FeMn2(PO4)3 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Mn3+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with six equivalent PO4 tetrahedra and a faceface with one FeO6 octahedra. There are three shorter (1.97 Å) and three longer (2.12 Å) Mn–O bond lengths. Fe3+ is bonded to six equivalent O2- atoms to form distorted FeO6 octahedra that share corners with six equivalent PO4 tetrahedra and faces with two equivalent MnO6 octahedra. All Fe–O bond lengths are 2.10 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent FeO6 octahedra and corners with four equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 31–54°. There is two shorter (1.52 Å) and two longer (1.58 Å) P–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn3+ and one P5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Mn3+, one Fe3+, and one P5+ atom.