Materials Data on Ho4Ge6Ir7 by Materials Project

Abstract

Ho4Ir7Ge6 crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Ho is bonded to six equivalent Ir and six equivalent Ge atoms to form HoGe6Ir6 cuboctahedra that share corners with twelve equivalent HoGe6Ir6 cuboctahedra, faces with six equivalent HoGe6Ir6 cuboctahedra, and faces with two equivalent IrGe6 octahedra. All Ho–Ir bond lengths are 2.97 Å. All Ho–Ge bond lengths are 3.02 Å. There are two inequivalent Ir sites. In the first Ir site, Ir is bonded to six equivalent Ge atoms to form IrGe6 octahedra that share faces with eight equivalent HoGe6Ir6 cuboctahedra. All Ir–Ge bond lengths are 2.67 Å. In the second Ir site, Ir is bonded in a 12-coordinate geometry to four equivalent Ho and four equivalent Ge atoms. All Ir–Ge bond lengths are 2.60 Å. Ge is bonded in a 9-coordinate geometry to four equivalent Ho and five Ir atoms.