Materials Data on Eu2Mn2O5 by Materials Project

Abstract

Eu2Mn2O5 crystallizes in the orthorhombic Ima2 space group. The structure is three-dimensional. Eu3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.36–2.94 Å. There are two inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four equivalent MnO6 octahedra and corners with two equivalent MnO4 tetrahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of Mn–O bond distances ranging from 1.97–2.14 Å. In the second Mn2+ site, Mn2+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with two equivalent MnO6 octahedra and corners with two equivalent MnO4 tetrahedra. The corner-sharing octahedral tilt angles are 32°. There are a spread of Mn–O bond distances ranging from 2.01–2.11 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Eu3+ and two equivalent Mn2+ atoms. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Eu3+ and two Mn2+ atoms. In the third O2- site, O2- is bonded to two equivalent Eu3+ and two equivalent Mn2+ atoms to form corner-sharing OEu2Mn2 tetrahedra.