Materials Data on Yb(CuS)2 by Materials Project
Yb(CuS)2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Yb2+ is bonded to six equivalent S2- atoms to form YbS6 octahedra that share corners with twelve equivalent CuS4 tetrahedra, edges with six equivalent YbS6 octahedra, and edges with six equivalent CuS4 tetrahedra. All Yb–S bond lengths are 2.78 Å. Cu1+ is bonded to four equivalent S2- atoms to form CuS4 tetrahedra that share corners with six equivalent YbS6 octahedra, corners with six equivalent CuS4 tetrahedra, edges with three equivalent YbS6 octahedra, and edges with three equivalent CuS4 tetrahedra. The corner-sharing octahedra tilt angles range from 18–54°. There are three shorter (2.36 Å) and one longer (2.42 Å) Cu–S bond lengths. S2- is bonded to three equivalent Yb2+ and four equivalent Cu1+ atoms to form a mixture of distorted edge and corner-sharing SYb3Cu4 pentagonal bipyramids.