EuGaGe crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six equivalent Ge(1) atoms to form distorted edge-sharing EuGe6 octahedra. In the second Eu site, Eu(2) is bonded in a 12-coordinate geometry to six equivalent Ga(1) and six equivalent Ge(1) atoms. Ga(1) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and three equivalent Ge(1) atoms. Ge(1) is bonded in a 6-coordinate geometry to three equivalent Eu(1), three equivalent Eu(2), and three equivalent Ga(1) atoms.
EuGaGe crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six equivalent Ge(1) atoms to form distorted edge-sharing EuGe6 octahedra. All Eu(1)-Ge(1) bond lengths are 3.17 Å. In the second Eu site, Eu(2) is bonded in a 12-coordinate geometry to six equivalent Ga(1) and six equivalent Ge(1) atoms. All Eu(2)-Ga(1) bond lengths are 3.08 Å. All Eu(2)-Ge(1) bond lengths are 3.48 Å. Ga(1) is bonded in a 6-coordinate geometry to three equivalent Eu(2) and three equivalent Ge(1) atoms. All Ga(1)-Ge(1) bond lengths are 2.51 Å. Ge(1) is bonded in a 6-coordinate geometry to three equivalent Eu(1), three equivalent Eu(2), and three equivalent Ga(1) atoms.