EuGa2Ge4 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 14-coordinate geometry to six equivalent Ga(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. Ga(1) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Ga(1), one Ge(1), and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 6-coordinate geometry to two equivalent Eu(1), two equivalent Ga(1), one Ge(1), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 6-coordinate geometry to two equivalent Eu(1), one Ga(1), one Ge(2), and two equivalent Ge(1) atoms.
EuGa2Ge4 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 14-coordinate geometry to six equivalent Ga(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two shorter (3.25 Å) and four longer (3.58 Å) Eu(1)-Ga(1) bond lengths. All Eu(1)-Ge(1) bond lengths are 3.44 Å. All Eu(1)-Ge(2) bond lengths are 3.60 Å. Ga(1) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Ga(1), one Ge(1), and two equivalent Ge(2) atoms. The Ga(1)-Ga(1) bond length is 2.49 Å. The Ga(1)-Ge(1) bond length is 2.50 Å. Both Ga(1)-Ge(2) bond lengths are 2.53 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 6-coordinate geometry to two equivalent Eu(1), two equivalent Ga(1), one Ge(1), and one Ge(2) atom. The Ge(2)-Ge(1) bond length is 2.53 Å. The Ge(2)-Ge(2) bond length is 2.53 Å. In the second Ge site, Ge(1) is bonded in a 6-coordinate geometry to two equivalent Eu(1), one Ga(1), one Ge(2), and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 2.55 Å.