Materials Data on Eu2Se3 by Materials Project

Eu2Se3 crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Eu–Se bond distances ranging from 2.92–2.97 Å. In the second Eu3+ site, Eu3+ is bonded to six Se2- atoms to form a mixture of corner and edge-sharing EuSe6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are a spread of Eu–Se bond distances ranging from 2.95–3.02 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms. In the second Se2- site, Se2- is bonded in a rectangular see-saw-like geometry to four Eu3+ atoms.

三硒化二铕（Eu₂Se₃）结晶于正交晶系（orthorhombic）Fddd空间群。其晶体结构为三维结构。体系中存在两个不等价的Eu³+位点。在第一个Eu³+位点中，Eu³+与六个Se²-配位，形成兼具共角与共边连接方式的EuSe₆八面体（octahedra）。共角八面体的倾斜角为7°。Eu-Se键长分布范围为2.92~2.97 埃（Å）。在第二个Eu³+位点中，Eu³+同样与六个Se²-配位，形成兼具共角与共边连接方式的EuSe₆八面体，共角八面体的倾斜角范围为6°~7°，Eu-Se键长分布范围为2.95~3.02 埃。体系中存在两个不等价的Se²-位点：在第一个Se²-位点中，Se²-以矩形跷跷板型几何构型与四个Eu³+配位；在第二个Se²-位点中，Se²-同样以矩形跷跷板型几何构型与四个Eu³+配位。