Materials Data on Eu2MgSe4 by Materials Project

MgEu2Se4 is Spinel structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent Se2- atoms to form MgSe4 tetrahedra that share corners with twelve equivalent EuSe6 octahedra. The corner-sharing octahedral tilt angles are 56°. All Mg–Se bond lengths are 2.64 Å. Eu3+ is bonded to six equivalent Se2- atoms to form EuSe6 octahedra that share corners with six equivalent MgSe4 tetrahedra and edges with six equivalent EuSe6 octahedra. All Eu–Se bond lengths are 2.96 Å. Se2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three equivalent Eu3+ atoms.

MgEu2Se4为尖晶石结构，结晶于立方晶系Fd-3m空间群。该结构为三维骨架结构。Mg²+与四个等价的Se²-配位形成MgSe4四面体，该四面体与十二个等价的EuSe6八面体共顶点。共顶点八面体的倾斜角为56°。所有Mg–Se键长均为2.64 Å。Eu³+与六个等价的Se²-配位形成EuSe6八面体，该八面体与六个等价的MgSe4四面体共顶点，同时与六个等价的EuSe6八面体共边。所有Eu–Se键长均为2.96 Å。Se²-以畸变的矩形跷跷板状配位几何与一个Mg²+及三个等价的Eu³+配位。