Materials Data on RbGdSe2 by Materials Project
RbGdSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Rb1+ is bonded to six equivalent Se2- atoms to form distorted RbSe6 octahedra that share corners with six equivalent GdSe6 octahedra, edges with six equivalent RbSe6 octahedra, and edges with six equivalent GdSe6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Rb–Se bond lengths are 3.47 Å. Gd3+ is bonded to six equivalent Se2- atoms to form GdSe6 octahedra that share corners with six equivalent RbSe6 octahedra, edges with six equivalent RbSe6 octahedra, and edges with six equivalent GdSe6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Gd–Se bond lengths are 2.94 Å. Se2- is bonded to three equivalent Rb1+ and three equivalent Gd3+ atoms to form a mixture of edge and corner-sharing SeRb3Gd3 octahedra. The corner-sharing octahedral tilt angles are 0°.