Nb2GeSb2 crystallizes in the tetragonal P4/mmm space group. Nb(1) is bonded to four equivalent Nb(1), one Ge(1), and one Sb(1) atom to form distorted NbNb4GeSb octahedra that share  a cornercorner with one Sb(1)NbSb5 octahedra, corners with five equivalent Nb(1)Nb4GeSb octahedra, edges with four equivalent Nb(1)Nb4GeSb octahedra, and edges with four equivalent Sb(1)NbSb5 octahedra. The corner-sharing octahedra are not tilted. Ge(1) is bonded in a distorted linear geometry to two equivalent Nb(1) atoms. Sb(1) is bonded to one Nb(1) and five equivalent Sb(1) atoms to form distorted SbNbSb5 octahedra that share  a cornercorner with one Nb(1)Nb4GeSb octahedra, corners with four equivalent Sb(1)NbSb5 octahedra, edges with four equivalent Nb(1)Nb4GeSb octahedra, and edges with eight equivalent Sb(1)NbSb5 octahedra. The corner-sharing octahedra are not tilted.
Nb2GeSb2 crystallizes in the tetragonal P4/mmm space group. Nb(1) is bonded to four equivalent Nb(1), one Ge(1), and one Sb(1) atom to form distorted NbNb4GeSb octahedra that share  a cornercorner with one Sb(1)NbSb5 octahedra, corners with five equivalent Nb(1)Nb4GeSb octahedra, edges with four equivalent Nb(1)Nb4GeSb octahedra, and edges with four equivalent Sb(1)NbSb5 octahedra. The corner-sharing octahedra are not tilted. All Nb(1)-Nb(1) bond lengths are 2.90 Å. The Nb(1)-Ge(1) bond length is 2.58 Å. The Nb(1)-Sb(1) bond length is 2.91 Å. Ge(1) is bonded in a distorted linear geometry to two equivalent Nb(1) atoms. Sb(1) is bonded to one Nb(1) and five equivalent Sb(1) atoms to form distorted SbNbSb5 octahedra that share  a cornercorner with one Nb(1)Nb4GeSb octahedra, corners with four equivalent Sb(1)NbSb5 octahedra, edges with four equivalent Nb(1)Nb4GeSb octahedra, and edges with eight equivalent Sb(1)NbSb5 octahedra. The corner-sharing octahedra are not tilted. There are four shorter (2.90 Å) and one longer (3.34 Å) Sb(1)-Sb(1) bond length.