Materials Data on MnFe2(PO8)2 by Materials Project

Abstract

MnFe2(PO7)2O2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional and consists of two oxygen molecules and one MnFe2(PO7)2 framework. In the MnFe2(PO7)2 framework, Mn is bonded to four O atoms to form MnO4 tetrahedra that share corners with two PO4 tetrahedra. There is two shorter (1.60 Å) and two longer (1.81 Å) Mn–O bond length. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Fe–O bond distances ranging from 1.92–2.31 Å. In the second Fe site, Fe is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Fe–O bond distances ranging from 1.92–2.25 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 a cornercorner with one MnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.60 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one MnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. There are fourteen inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Mn atom. In the second O site, O is bonded in a single-bond geometry to one Mn atom. In the third O site, O is bonded in a distorted L-shaped geometry to one Fe and one O atom. The O–O bond length is 1.34 Å. In the fourth O site, O is bonded in a distorted L-shaped geometry to one Fe and one O atom. The O–O bond length is 1.33 Å. In the fifth O site, O is bonded in a bent 120 degrees geometry to one Mn and one P atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the eighth O site, O is bonded in a bent 120 degrees geometry to one Fe and one P atom. In the ninth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to one Fe and one P atom. In the eleventh O site, O is bonded in a bent 150 degrees geometry to one Mn and one P atom. In the twelfth O site, O is bonded in a bent 120 degrees geometry to one Fe and one P atom. In the thirteenth O site, O is bonded in a 1-coordinate geometry to two Fe and one O atom. In the fourteenth O site, O is bonded in a 3-coordinate geometry to two Fe and one O atom.