LiDySe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Li(1) is bonded to six equivalent Se(1) atoms to form LiSe6 octahedra that share corners with six equivalent Dy(1)Se6 octahedra, edges with six equivalent Li(1)Se6 octahedra, and edges with six equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Dy(1) is bonded to six equivalent Se(1) atoms to form DySe6 octahedra that share corners with six equivalent Li(1)Se6 octahedra, edges with six equivalent Li(1)Se6 octahedra, and edges with six equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Se(1) is bonded to three equivalent Li(1) and three equivalent Dy(1) atoms to form a mixture of edge and corner-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra are not tilted.
LiDySe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Li(1) is bonded to six equivalent Se(1) atoms to form LiSe6 octahedra that share corners with six equivalent Dy(1)Se6 octahedra, edges with six equivalent Li(1)Se6 octahedra, and edges with six equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Li(1)-Se(1) bond lengths are 2.83 Å. Dy(1) is bonded to six equivalent Se(1) atoms to form DySe6 octahedra that share corners with six equivalent Li(1)Se6 octahedra, edges with six equivalent Li(1)Se6 octahedra, and edges with six equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Dy(1)-Se(1) bond lengths are 2.85 Å. Se(1) is bonded to three equivalent Li(1) and three equivalent Dy(1) atoms to form a mixture of edge and corner-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra are not tilted.