RbSmS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent S(1) atoms to form distorted RbS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 12°. Sm(1) is bonded to six equivalent S(1) atoms to form SmS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 12°. S(1) is bonded to three equivalent Rb(1) and three equivalent Sm(1) atoms to form a mixture of corner and edge-sharing SRb3Sm3 octahedra. The corner-sharing octahedra are not tilted.
RbSmS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Rb(1) is bonded to six equivalent S(1) atoms to form distorted RbS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Rb(1)-S(1) bond lengths are 3.35 Å. Sm(1) is bonded to six equivalent S(1) atoms to form SmS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 12°. All Sm(1)-S(1) bond lengths are 2.83 Å. S(1) is bonded to three equivalent Rb(1) and three equivalent Sm(1) atoms to form a mixture of corner and edge-sharing SRb3Sm3 octahedra. The corner-sharing octahedra are not tilted.