RbHoSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent Se(1) atoms to form distorted RbSe6 octahedra that share corners with six equivalent Ho(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 12°. Ho(1) is bonded to six equivalent Se(1) atoms to form HoSe6 octahedra that share corners with six equivalent Rb(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 12°. Se(1) is bonded to three equivalent Rb(1) and three equivalent Ho(1) atoms to form a mixture of corner and edge-sharing SeRb3Ho3 octahedra. The corner-sharing octahedra are not tilted.
RbHoSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent Se(1) atoms to form distorted RbSe6 octahedra that share corners with six equivalent Ho(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Rb(1)-Se(1) bond lengths are 3.43 Å. Ho(1) is bonded to six equivalent Se(1) atoms to form HoSe6 octahedra that share corners with six equivalent Rb(1)Se6 octahedra, edges with six equivalent Rb(1)Se6 octahedra, and edges with six equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Ho(1)-Se(1) bond lengths are 2.88 Å. Se(1) is bonded to three equivalent Rb(1) and three equivalent Ho(1) atoms to form a mixture of corner and edge-sharing SeRb3Ho3 octahedra. The corner-sharing octahedra are not tilted.