Materials Data on Cr3(FeO6)2 by Materials Project

Abstract

Cr3(FeO6)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Cr6+ sites. In the first Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 20–41°. There is one shorter (1.66 Å) and three longer (1.67 Å) Cr–O bond length. In the second Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 19–42°. There are a spread of Cr–O bond distances ranging from 1.66–1.68 Å. In the third Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 33–43°. There is one shorter (1.66 Å) and three longer (1.67 Å) Cr–O bond length. There are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six CrO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.99–2.06 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six CrO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.98–2.02 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Fe3+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Fe3+ atom.