GdGa6 crystallizes in the tetragonal P4/nbm space group. Gd(1) is bonded to four equivalent Ga(2) and eight equivalent Ga(1) atoms to form a mixture of face and edge-sharing GdGa12 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Gd(1), one Ga(1), and four equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to one Gd(1), one Ga(2), and two equivalent Ga(1) atoms.
GdGa6 crystallizes in the tetragonal P4/nbm space group. Gd(1) is bonded to four equivalent Ga(2) and eight equivalent Ga(1) atoms to form a mixture of face and edge-sharing GdGa12 cuboctahedra. All Gd(1)-Ga(2) bond lengths are 3.09 Å. All Gd(1)-Ga(1) bond lengths are 3.21 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Gd(1), one Ga(1), and four equivalent Ga(2) atoms. The Ga(1)-Ga(1) bond length is 2.42 Å. All Ga(1)-Ga(2) bond lengths are 2.57 Å. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to one Gd(1), one Ga(2), and two equivalent Ga(1) atoms. The Ga(2)-Ga(2) bond length is 2.49 Å.