Materials Data on Dy(CuSe)3 by Materials Project
Dy(CuSe)3 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Dy3+ is bonded to six equivalent Se2- atoms to form DySe6 octahedra that share corners with twelve equivalent CuSe4 tetrahedra, edges with three equivalent DySe6 octahedra, and edges with six equivalent CuSe4 tetrahedra. There are three shorter (2.87 Å) and three longer (2.88 Å) Dy–Se bond lengths. Cu1+ is bonded to four equivalent Se2- atoms to form CuSe4 tetrahedra that share corners with four equivalent DySe6 octahedra, corners with six equivalent CuSe4 tetrahedra, edges with two equivalent DySe6 octahedra, and edges with three equivalent CuSe4 tetrahedra. The corner-sharing octahedra tilt angles range from 16–60°. There are a spread of Cu–Se bond distances ranging from 2.42–2.52 Å. Se2- is bonded in a 6-coordinate geometry to two equivalent Dy3+ and four equivalent Cu1+ atoms.