Materials Data on Eu3AlO5 by Materials Project

Abstract

Eu3AlO5 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent Eu+2.33+ sites. In the first Eu+2.33+ site, Eu+2.33+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.36–2.73 Å. In the second Eu+2.33+ site, Eu+2.33+ is bonded in a distorted q6 geometry to ten O2- atoms. There are two shorter (2.78 Å) and eight longer (2.81 Å) Eu–O bond lengths. Al3+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Al–O bond lengths are 1.76 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to six Eu+2.33+ atoms to form corner-sharing OEu6 octahedra. The corner-sharing octahedra tilt angles range from 0–32°. In the second O2- site, O2- is bonded in a 6-coordinate geometry to five Eu+2.33+ and one Al3+ atom.