NaLaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Na(1) is bonded to six equivalent S(1) atoms to form NaS6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent Na(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 Na(1)S6 octahedra, edges with six equivalent Na(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 Na(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SNa3La3 octahedra. The corner-sharing octahedra are not tilted.
NaLaS2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Na(1) is bonded to six equivalent S(1) atoms to form NaS6 octahedra that share corners with six equivalent La(1)S6 octahedra, edges with six equivalent Na(1)S6 octahedra, and edges with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles are 3°. All Na(1)-S(1) bond lengths are 2.99 Å. La(1) is bonded to six equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Na(1)S6 octahedra, edges with six equivalent Na(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 2.90 Å. S(1) is bonded to three equivalent Na(1) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing SNa3La3 octahedra. The corner-sharing octahedra are not tilted.