Ho4Ir7Ge6 crystallizes in the cubic Im-3m space group. Ho(1) is bonded to six equivalent Ir(1) and six equivalent Ge(1) atoms to form HoGe6Ir6 cuboctahedra that share corners with twelve equivalent Ho(1)Ge6Ir6 cuboctahedra, faces with six equivalent Ho(1)Ge6Ir6 cuboctahedra, and faces with two equivalent Ir(2)Ge6 octahedra. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded to six equivalent Ge(1) atoms to form IrGe6 octahedra that share faces with eight equivalent Ho(1)Ge6Ir6 cuboctahedra. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent Ho(1) and four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), one Ir(2), and four equivalent Ir(1) atoms.
Ho4Ir7Ge6 crystallizes in the cubic Im-3m space group. Ho(1) is bonded to six equivalent Ir(1) and six equivalent Ge(1) atoms to form HoGe6Ir6 cuboctahedra that share corners with twelve equivalent Ho(1)Ge6Ir6 cuboctahedra, faces with six equivalent Ho(1)Ge6Ir6 cuboctahedra, and faces with two equivalent Ir(2)Ge6 octahedra. All Ho(1)-Ir(1) bond lengths are 2.97 Å. All Ho(1)-Ge(1) bond lengths are 3.02 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded to six equivalent Ge(1) atoms to form IrGe6 octahedra that share faces with eight equivalent Ho(1)Ge6Ir6 cuboctahedra. All Ir(2)-Ge(1) bond lengths are 2.67 Å. In the second Ir site, Ir(1) is bonded in a 8-coordinate geometry to four equivalent Ho(1) and four equivalent Ge(1) atoms. All Ir(1)-Ge(1) bond lengths are 2.60 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), one Ir(2), and four equivalent Ir(1) atoms.