Materials Data on NaDySe2 by Materials Project
NaDySe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Na1+ is bonded to six equivalent Se2- atoms to form NaSe6 octahedra that share corners with six equivalent DySe6 octahedra, edges with six equivalent NaSe6 octahedra, and edges with six equivalent DySe6 octahedra. The corner-sharing octahedral tilt angles are 5°. All Na–Se bond lengths are 3.06 Å. Dy3+ is bonded to six equivalent Se2- atoms to form DySe6 octahedra that share corners with six equivalent NaSe6 octahedra, edges with six equivalent NaSe6 octahedra, and edges with six equivalent DySe6 octahedra. The corner-sharing octahedral tilt angles are 5°. All Dy–Se bond lengths are 2.88 Å. Se2- is bonded to three equivalent Na1+ and three equivalent Dy3+ atoms to form a mixture of edge and corner-sharing SeNa3Dy3 octahedra. The corner-sharing octahedral tilt angles are 0°.