Materials Data on DyTlSe2 by Materials Project
DyTlSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Dy3+ is bonded to six equivalent Se2- atoms to form DySe6 octahedra that share corners with six equivalent TlSe6 octahedra, edges with six equivalent DySe6 octahedra, and edges with six equivalent TlSe6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Dy–Se bond lengths are 2.89 Å. Tl1+ is bonded to six equivalent Se2- atoms to form distorted TlSe6 octahedra that share corners with six equivalent DySe6 octahedra, edges with six equivalent DySe6 octahedra, and edges with six equivalent TlSe6 octahedra. The corner-sharing octahedral tilt angles are 10°. All Tl–Se bond lengths are 3.34 Å. Se2- is bonded to three equivalent Dy3+ and three equivalent Tl1+ atoms to form a mixture of edge and corner-sharing SeDy3Tl3 octahedra. The corner-sharing octahedral tilt angles are 0°.