Materials Data on La2MgSe4 by Materials Project

MgLa2Se4 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 LaSe6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Mg–Se bond lengths are 2.67 Å. La3+ is bonded to six equivalent Se2- atoms to form LaSe6 octahedra that share corners with six equivalent MgSe4 tetrahedra and edges with six equivalent LaSe6 octahedra. All La–Se bond lengths are 3.02 Å. Se2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three equivalent La3+ atoms.