Tm4Os7Ge6 crystallizes in the cubic Im-3m space group. Tm(1) is bonded to six equivalent Os(1) and six equivalent Ge(1) atoms to form TmGe6Os6 cuboctahedra that share corners with twelve equivalent Tm(1)Ge6Os6 cuboctahedra, faces with six equivalent Tm(1)Ge6Os6 cuboctahedra, and faces with two equivalent Os(2)Ge6 octahedra. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded to six equivalent Ge(1) atoms to form OsGe6 octahedra that share faces with eight equivalent Tm(1)Ge6Os6 cuboctahedra. In the second Os site, Os(1) is bonded in a 8-coordinate geometry to four equivalent Tm(1) and four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Os(2), and four equivalent Os(1) atoms.
Tm4Os7Ge6 crystallizes in the cubic Im-3m space group. Tm(1) is bonded to six equivalent Os(1) and six equivalent Ge(1) atoms to form TmGe6Os6 cuboctahedra that share corners with twelve equivalent Tm(1)Ge6Os6 cuboctahedra, faces with six equivalent Tm(1)Ge6Os6 cuboctahedra, and faces with two equivalent Os(2)Ge6 octahedra. All Tm(1)-Os(1) bond lengths are 2.93 Å. All Tm(1)-Ge(1) bond lengths are 2.97 Å. There are two inequivalent Os sites. In the first Os site, Os(2) is bonded to six equivalent Ge(1) atoms to form OsGe6 octahedra that share faces with eight equivalent Tm(1)Ge6Os6 cuboctahedra. All Os(2)-Ge(1) bond lengths are 2.57 Å. In the second Os site, Os(1) is bonded in a 8-coordinate geometry to four equivalent Tm(1) and four equivalent Ge(1) atoms. All Os(1)-Ge(1) bond lengths are 2.59 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tm(1), one Os(2), and four equivalent Os(1) atoms.