ULaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to six equivalent S(1) atoms to form US6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent U(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 3°. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent U(1)S6 octahedra, edges with six equivalent U(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 3°. S(1) is bonded to three equivalent U(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SLa3U3 octahedra. The corner-sharing octahedra are not tilted.
ULaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to six equivalent S(1) atoms to form US6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent U(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 3°. All U(1)-S(1) bond lengths are 2.82 Å. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent U(1)S6 octahedra, edges with six equivalent U(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 3°. All La(1)-S(1) bond lengths are 2.93 Å. S(1) is bonded to three equivalent U(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SLa3U3 octahedra. The corner-sharing octahedra are not tilted.