TmLaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Tm(1) is bonded to six equivalent S(1) atoms to form TmS6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent Tm(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 6°. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Tm(1)S6 octahedra, edges with six equivalent Tm(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 6°. S(1) is bonded to three equivalent Tm(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SLa3Tm3 octahedra. The corner-sharing octahedra are not tilted.
TmLaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Tm(1) is bonded to six equivalent S(1) atoms to form TmS6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent Tm(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 6°. All Tm(1)-S(1) bond lengths are 2.71 Å. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Tm(1)S6 octahedra, edges with six equivalent Tm(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 6°. All La(1)-S(1) bond lengths are 2.95 Å. S(1) is bonded to three equivalent Tm(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SLa3Tm3 octahedra. The corner-sharing octahedra are not tilted.