KEuS2 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 Eu(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Eu(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. Eu(1) is bonded to six equivalent S(1) atoms to form EuS6 octahedra that share corners with six equivalent K(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Eu(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. S(1) is bonded to three equivalent K(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SK3Eu3 octahedra. The corner-sharing octahedra are not tilted.
KEuS2 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 Eu(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Eu(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. All K(1)-S(1) bond lengths are 3.23 Å. Eu(1) is bonded to six equivalent S(1) atoms to form EuS6 octahedra that share corners with six equivalent K(1)S6 octahedra, edges with six equivalent K(1)S6 octahedra, and edges with six equivalent Eu(1)S6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Eu(1)-S(1) bond lengths are 2.84 Å. S(1) is bonded to three equivalent K(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SK3Eu3 octahedra. The corner-sharing octahedra are not tilted.