Materials Data on Fe2(TeO3)3 by Materials Project

Abstract

Fe2(TeO3)3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Fe3+ is bonded to six O2- atoms to form distorted face-sharing FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.94–2.16 Å. There are three inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There is two shorter (1.88 Å) and one longer (1.97 Å) Te–O bond length. In the second Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. All Te–O bond lengths are 1.92 Å. In the third Te4+ site, Te4+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Te–O bond distances ranging from 1.89–2.64 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one Te4+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one Te4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Fe3+ and one Te4+ atom. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two equivalent Fe3+ and one Te4+ atom. In the fifth O2- site, O2- is bonded in a distorted T-shaped geometry to two equivalent Fe3+ and one Te4+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Fe3+ and two Te4+ atoms.