YbGa4Ge2 crystallizes in the tetragonal I4cm space group. Yb(1) is bonded in a 14-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), four equivalent Ga(3), and two equivalent Ge(1) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to two equivalent Yb(1), two equivalent Ga(3), and one Ge(1) atom. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(3), and four equivalent Ge(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(2), and four equivalent Ga(1) atoms. Ge(1) is bonded in a 5-coordinate geometry to one Yb(1), one Ga(1), two equivalent Ga(2), and one Ge(1) atom.
YbGa4Ge2 crystallizes in the tetragonal I4cm space group. Yb(1) is bonded in a 14-coordinate geometry to four equivalent Ga(1), four equivalent Ga(2), four equivalent Ga(3), and two equivalent Ge(1) atoms. There are two shorter (3.15 Å) and two longer (3.58 Å) Yb(1)-Ga(1) bond lengths. All Yb(1)-Ga(2) bond lengths are 3.34 Å. All Yb(1)-Ga(3) bond lengths are 3.26 Å. Both Yb(1)-Ge(1) bond lengths are 3.02 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 4-coordinate geometry to two equivalent Yb(1), two equivalent Ga(3), and one Ge(1) atom. Both Ga(1)-Ga(3) bond lengths are 2.62 Å. The Ga(1)-Ge(1) bond length is 2.56 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(3), and four equivalent Ge(1) atoms. The Ga(2)-Ga(3) bond length is 2.49 Å. All Ga(2)-Ge(1) bond lengths are 2.65 Å. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to four equivalent Yb(1), one Ga(2), and four equivalent Ga(1) atoms. Ge(1) is bonded in a 5-coordinate geometry to one Yb(1), one Ga(1), two equivalent Ga(2), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.75 Å.