RbGdS2 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 Gd(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Gd(1)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. Gd(1) is bonded to six equivalent S(1) atoms to form GdS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Gd(1)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. S(1) is bonded to three equivalent Rb(1) and three equivalent Gd(1) atoms to form a mixture of corner and edge-sharing SRb3Gd3 octahedra. The corner-sharing octahedra are not tilted.
RbGdS2 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 Gd(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Gd(1)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. All Rb(1)-S(1) bond lengths are 3.34 Å. Gd(1) is bonded to six equivalent S(1) atoms to form GdS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent Gd(1)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. All Gd(1)-S(1) bond lengths are 2.80 Å. S(1) is bonded to three equivalent Rb(1) and three equivalent Gd(1) atoms to form a mixture of corner and edge-sharing SRb3Gd3 octahedra. The corner-sharing octahedra are not tilted.