Materials Data on RbYbZnSe3 by Materials Project

Abstract

RbYbZnSe3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Rb1+ is bonded in a 8-coordinate geometry to eight Se2- atoms. There are six shorter (3.57 Å) and two longer (3.98 Å) Rb–Se bond lengths. Yb3+ is bonded to six Se2- atoms to form YbSe6 octahedra that share corners with two equivalent YbSe6 octahedra, edges with two equivalent YbSe6 octahedra, and edges with four equivalent ZnSe4 tetrahedra. The corner-sharing octahedral tilt angles are 36°. All Yb–Se bond lengths are 2.92 Å. Zn2+ is bonded to four Se2- atoms to form ZnSe4 tetrahedra that share corners with two equivalent ZnSe4 tetrahedra and edges with four equivalent YbSe6 octahedra. There are two shorter (2.46 Å) and two longer (2.54 Å) Zn–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 6-coordinate geometry to three equivalent Rb1+, two equivalent Yb3+, and one Zn2+ atom. In the second Se2- site, Se2- is bonded in a 6-coordinate geometry to two equivalent Rb1+, two equivalent Yb3+, and two equivalent Zn2+ atoms.