RbLaS2 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 La(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 11°. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 11°. S(1) is bonded to three equivalent Rb(1) and three equivalent La(1) atoms to form a mixture of edge and corner-sharing SRb3La3 octahedra. The corner-sharing octahedra are not tilted.
RbLaS2 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 La(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 11°. All Rb(1)-S(1) bond lengths are 3.39 Å. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Rb(1)S6 octahedra, edges with six equivalent Rb(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 11°. All La(1)-S(1) bond lengths are 2.92 Å. S(1) is bonded to three equivalent Rb(1) and three equivalent La(1) atoms to form a mixture of edge and corner-sharing SRb3La3 octahedra. The corner-sharing octahedra are not tilted.