KSmS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. K(1) is bonded to six equivalent S(1) atoms to form KS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. Sm(1) is bonded to six equivalent S(1) atoms to form SmS6 octahedra that share corners with six equivalent K(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. S(1) is bonded to three equivalent K(1) and three equivalent Sm(1) atoms to form a mixture of edge and corner-sharing SK3Sm3 octahedra. The corner-sharing octahedra are not tilted.
KSmS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. K(1) is bonded to six equivalent S(1) atoms to form KS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. All K(1)-S(1) bond lengths are 3.21 Å. Sm(1) is bonded to six equivalent S(1) atoms to form SmS6 octahedra that share corners with six equivalent K(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Sm(1)-S(1) bond lengths are 2.83 Å. S(1) is bonded to three equivalent K(1) and three equivalent Sm(1) atoms to form a mixture of edge and corner-sharing SK3Sm3 octahedra. The corner-sharing octahedra are not tilted.