Materials Data on Sm2EuBeO5 by Materials Project
BeEuSm2O5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Be2+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Be–O bond distances ranging from 1.62–1.71 Å. Eu2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Eu–O bond distances ranging from 2.57–2.80 Å. There are two inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.34–2.92 Å. In the second Sm3+ site, Sm3+ is bonded in a 7-coordinate geometry to nine O2- atoms. There are a spread of Sm–O bond distances ranging from 2.40–2.86 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Be2+, two equivalent Eu2+, and three Sm3+ atoms. In the second O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent Eu2+ and four Sm3+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+, three equivalent Eu2+, and two equivalent Sm3+ atoms. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+ and five Sm3+ atoms. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Be2+, two equivalent Eu2+, and three Sm3+ atoms.