BaAu3Ge crystallizes in the tetragonal I4mm space group. Ba(1) is bonded in a 17-coordinate geometry to four equivalent Au(2), eight equivalent Au(1), and five equivalent Ge(1) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1) and two equivalent Ge(1) atoms. In the second Au site, Au(2) is bonded in a distorted single-bond geometry to four equivalent Ba(1) and one Ge(1) atom. Ge(1) is bonded in a 5-coordinate geometry to five equivalent Ba(1), one Au(2), and four equivalent Au(1) atoms.
BaAu3Ge crystallizes in the tetragonal I4mm space group. Ba(1) is bonded in a 17-coordinate geometry to four equivalent Au(2), eight equivalent Au(1), and five equivalent Ge(1) atoms. All Ba(1)-Au(2) bond lengths are 3.55 Å. There are four shorter (3.44 Å) and four longer (3.57 Å) Ba(1)-Au(1) bond lengths. There is one shorter (3.61 Å) and four longer (3.71 Å) Ba(1)-Ge(1) bond lengths. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1) and two equivalent Ge(1) atoms. Both Au(1)-Ge(1) bond lengths are 2.58 Å. In the second Au site, Au(2) is bonded in a distorted single-bond geometry to four equivalent Ba(1) and one Ge(1) atom. The Au(2)-Ge(1) bond length is 2.56 Å. Ge(1) is bonded in a 5-coordinate geometry to five equivalent Ba(1), one Au(2), and four equivalent Au(1) atoms.