La2Al3Ge is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. La(1) is bonded to three equivalent Al(1), three equivalent Al(2), three equivalent Al(3), and three equivalent Ge(1) atoms to form a mixture of face and edge-sharing LaAl9Ge3 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to six equivalent La(1) and three equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a distorted trigonal planar geometry to six equivalent La(1) and three equivalent Ge(1) atoms. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to six equivalent La(1) and three equivalent Al(1) atoms. Ge(1) is bonded in a distorted trigonal planar geometry to six equivalent La(1) and three equivalent Al(2) atoms.
La2Al3Ge is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. La(1) is bonded to three equivalent Al(1), three equivalent Al(2), three equivalent Al(3), and three equivalent Ge(1) atoms to form a mixture of face and edge-sharing LaAl9Ge3 cuboctahedra. All La(1)-Al(1) bond lengths are 3.38 Å. All La(1)-Al(2) bond lengths are 3.37 Å. All La(1)-Al(3) bond lengths are 3.38 Å. All La(1)-Ge(1) bond lengths are 3.37 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to six equivalent La(1) and three equivalent Al(3) atoms. All Al(1)-Al(3) bond lengths are 2.54 Å. In the second Al site, Al(2) is bonded in a distorted trigonal planar geometry to six equivalent La(1) and three equivalent Ge(1) atoms. All Al(2)-Ge(1) bond lengths are 2.54 Å. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to six equivalent La(1) and three equivalent Al(1) atoms. Ge(1) is bonded in a distorted trigonal planar geometry to six equivalent La(1) and three equivalent Al(2) atoms.