Tm5(GeSb)2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to three equivalent Ge(1) and three equivalent Sb(1) atoms to form distorted TmGe3Sb3 pentagonal pyramids that share corners with three equivalent Tm(2)Ge4Sb2 octahedra, corners with ten equivalent Tm(1)Ge3Sb3 pentagonal pyramids, edges with seven equivalent Tm(1)Ge3Sb3 pentagonal pyramids, faces with two equivalent Tm(2)Ge4Sb2 octahedra, and faces with two equivalent Tm(1)Ge3Sb3 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 35-42°. In the second Tm site, Tm(2) is bonded to four equivalent Ge(1) and two equivalent Sb(1) atoms to form TmGe4Sb2 octahedra that share corners with four equivalent Tm(2)Ge4Sb2 octahedra, corners with twelve equivalent Tm(1)Ge3Sb3 pentagonal pyramids, and faces with eight equivalent Tm(1)Ge3Sb3 pentagonal pyramids. The corner-sharing octahedral tilt angles are 46°. Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tm(2) and six equivalent Tm(1) atoms. Sb(1) is bonded to one Tm(2) and six equivalent Tm(1) atoms to form a mixture of distorted corner and edge-sharing SbTm7 pentagonal bipyramids.
Tm5(GeSb)2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to three equivalent Ge(1) and three equivalent Sb(1) atoms to form distorted TmGe3Sb3 pentagonal pyramids that share corners with three equivalent Tm(2)Ge4Sb2 octahedra, corners with ten equivalent Tm(1)Ge3Sb3 pentagonal pyramids, edges with seven equivalent Tm(1)Ge3Sb3 pentagonal pyramids, faces with two equivalent Tm(2)Ge4Sb2 octahedra, and faces with two equivalent Tm(1)Ge3Sb3 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 35-42°. There is one shorter (2.86 Å) and two longer (3.02 Å) Tm(1)-Ge(1) bond lengths. There is one shorter (3.09 Å) and two longer (3.16 Å) Tm(1)-Sb(1) bond lengths. In the second Tm site, Tm(2) is bonded to four equivalent Ge(1) and two equivalent Sb(1) atoms to form TmGe4Sb2 octahedra that share corners with four equivalent Tm(2)Ge4Sb2 octahedra, corners with twelve equivalent Tm(1)Ge3Sb3 pentagonal pyramids, and faces with eight equivalent Tm(1)Ge3Sb3 pentagonal pyramids. The corner-sharing octahedral tilt angles are 46°. There are two shorter (2.99 Å) and two longer (3.02 Å) Tm(2)-Ge(1) bond lengths. Both Tm(2)-Sb(1) bond lengths are 3.03 Å. Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tm(2) and six equivalent Tm(1) atoms. Sb(1) is bonded to one Tm(2) and six equivalent Tm(1) atoms to form a mixture of distorted corner and edge-sharing SbTm7 pentagonal bipyramids.