La2Al3Ge4 crystallizes in the orthorhombic Cmce space group. La(1) is bonded in a 8-coordinate geometry to four equivalent Ge(1) and four equivalent Ge(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one Ge(1) and four equivalent Ge(2) atoms. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to two equivalent Ge(2) and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent La(1), one Al(1), and two equivalent Al(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Al(2), and four equivalent Al(1) atoms.
La2Al3Ge4 crystallizes in the orthorhombic Cmce space group. La(1) is bonded in a 8-coordinate geometry to four equivalent Ge(1) and four equivalent Ge(2) atoms. There are two shorter (3.22 Å) and two longer (3.24 Å) La(1)-Ge(1) bond lengths. There are a spread of La(1)-Ge(2) bond distances ranging from 3.14-3.24 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to one Ge(1) and four equivalent Ge(2) atoms. The Al(1)-Ge(1) bond length is 2.54 Å. There are two shorter (2.65 Å) and two longer (2.92 Å) Al(1)-Ge(2) bond lengths. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to two equivalent Ge(2) and four equivalent Ge(1) atoms. Both Al(2)-Ge(2) bond lengths are 2.89 Å. All Al(2)-Ge(1) bond lengths are 2.64 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent La(1), one Al(1), and two equivalent Al(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent La(1), one Al(2), and four equivalent Al(1) atoms.