Materials Data on Sr2EuBeO5 by Materials Project

Abstract

Sr2BeEuO5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sr is bonded in a 9-coordinate geometry to eight O atoms. There are a spread of Sr–O bond distances ranging from 2.56–2.78 Å. Be is bonded in a tetrahedral geometry to four O atoms. There is three shorter (1.66 Å) and one longer (1.70 Å) Be–O bond length. Eu is bonded in a 7-coordinate geometry to eight O atoms. There are a spread of Eu–O bond distances ranging from 2.30–3.14 Å. There are four inequivalent O sites. In the first O site, O is bonded in a 1-coordinate geometry to four equivalent Sr, one Be, and one Eu atom. In the second O site, O is bonded in a distorted single-bond geometry to two equivalent Sr, one Be, and two equivalent Eu atoms. In the third O site, O is bonded in a 5-coordinate geometry to four equivalent Sr and two equivalent Eu atoms. In the fourth O site, O is bonded in a distorted single-bond geometry to four equivalent Sr, one Be, and one Eu atom.