LiDySe2 is Caswellsilverite-like structured and crystallizes in the tetragonal I4_1/amd space group. Li(1) is bonded to six Se(1,1) atoms to form LiSe6 octahedra that share corners with two equivalent Dy(1)Se6 octahedra, corners with four equivalent Li(1)Se6 octahedra, edges with four equivalent Li(1)Se6 octahedra, and edges with eight equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Dy(1) is bonded to six Se(1,1) atoms to form DySe6 octahedra that share corners with two equivalent Li(1)Se6 octahedra, corners with four equivalent Dy(1)Se6 octahedra, edges with four equivalent Dy(1)Se6 octahedra, and edges with eight equivalent Li(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are four inequivalent Se sites. In the first Se site, 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 octahedral tilt angles range from 0-2°. In the second Se site, 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 octahedral tilt angles range from 0-2°. In the third Se site, 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 octahedral tilt angles range from 0-2°. In the fourth Se site, 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 octahedral tilt angles range from 0-2°.
LiDySe2 is Caswellsilverite-like structured and crystallizes in the tetragonal I4_1/amd space group. Li(1) is bonded to six Se(1,1) atoms to form LiSe6 octahedra that share corners with two equivalent Dy(1)Se6 octahedra, corners with four equivalent Li(1)Se6 octahedra, edges with four equivalent Li(1)Se6 octahedra, and edges with eight equivalent Dy(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are four shorter (2.83 Å) and two longer (2.94 Å) Li(1)-Se(1,1) bond lengths. Dy(1) is bonded to six Se(1,1) atoms to form DySe6 octahedra that share corners with two equivalent Li(1)Se6 octahedra, corners with four equivalent Dy(1)Se6 octahedra, edges with four equivalent Dy(1)Se6 octahedra, and edges with eight equivalent Li(1)Se6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are four shorter (2.83 Å) and two longer (2.84 Å) Dy(1)-Se(1,1) bond lengths. There are four inequivalent Se sites. In the first Se site, 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 octahedral tilt angles range from 0-2°. There are two shorter (2.83 Å) and one longer (2.94 Å) Se(1)-Li(1) bond length. In the second Se site, 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 octahedral tilt angles range from 0-2°. There are two shorter (2.83 Å) and one longer (2.84 Å) Se(1)-Dy(1) bond length. In the third Se site, 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 octahedral tilt angles range from 0-2°. In the fourth Se site, 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 octahedral tilt angles range from 0-2°. There are two shorter (2.83 Å) and one longer (2.94 Å) Se(1)-Li(1) bond length. There are two shorter (2.83 Å) and one longer (2.84 Å) Se(1)-Dy(1) bond length.