Ba3Ga2Al3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to four equivalent Ga(1) and six equivalent Al(1) atoms. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to six equivalent Ga(1) atoms. Ga(1) is bonded in a 10-coordinate geometry to three equivalent Ba(2), four equivalent Ba(1), and three equivalent Al(1) atoms. Al(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1) and two equivalent Ga(1) atoms.
Ba3Ga2Al3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to four equivalent Ga(1) and six equivalent Al(1) atoms. There are three shorter (3.44 Å) and one longer (3.52 Å) Ba(1)-Ga(1) bond length. All Ba(1)-Al(1) bond lengths are 3.52 Å. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to six equivalent Ga(1) atoms. All Ba(2)-Ga(1) bond lengths are 3.84 Å. Ga(1) is bonded in a 10-coordinate geometry to three equivalent Ba(2), four equivalent Ba(1), and three equivalent Al(1) atoms. All Ga(1)-Al(1) bond lengths are 2.69 Å. Al(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1) and two equivalent Ga(1) atoms.