La6Fe13Al crystallizes in the tetragonal I4/mcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Fe(1), three equivalent Fe(2), and two equivalent Al(1) atoms. In the second La site, La(2) is bonded in a 13-coordinate geometry to four equivalent Fe(1), four equivalent Fe(2), four equivalent Fe(4), and one Al(1) atom. There are four inequivalent Fe sites. In the first Fe site, Fe(2) is bonded to two equivalent La(2), three equivalent La(1), one Fe(2), one Fe(3), two equivalent Fe(4), and three equivalent Fe(1) atoms to form distorted FeLa5Fe7 cuboctahedra that share  a cornercorner with one Fe(3)Fe12 cuboctahedra, corners with three equivalent Fe(2)La5Fe7 cuboctahedra, corners with four equivalent Fe(4)La2Fe10 cuboctahedra,  a faceface with one Fe(3)Fe12 cuboctahedra, faces with six equivalent Fe(2)La5Fe7 cuboctahedra, and faces with eight equivalent Fe(4)La2Fe10 cuboctahedra. In the second Fe site, Fe(3) is bonded to four equivalent Fe(1), four equivalent Fe(2), and four equivalent Fe(4) atoms to form FeFe12 cuboctahedra that share corners with four equivalent Fe(4)La2Fe10 cuboctahedra, corners with four equivalent Fe(2)La5Fe7 cuboctahedra, faces with four equivalent Fe(2)La5Fe7 cuboctahedra, and faces with eight equivalent Fe(4)La2Fe10 cuboctahedra. In the third Fe site, Fe(4) is bonded to two equivalent La(2), one Fe(3), two equivalent Fe(2), three equivalent Fe(4), and four equivalent Fe(1) atoms to form FeLa2Fe10 cuboctahedra that share  a cornercorner with one Fe(3)Fe12 cuboctahedra, corners with three equivalent Fe(4)La2Fe10 cuboctahedra, corners with four equivalent Fe(2)La5Fe7 cuboctahedra, faces with two equivalent Fe(3)Fe12 cuboctahedra, faces with seven equivalent Fe(4)La2Fe10 cuboctahedra, and faces with eight equivalent Fe(2)La5Fe7 cuboctahedra. In the fourth Fe site, Fe(1) is bonded in a 12-coordinate geometry to one La(1), two equivalent La(2), one Fe(1), one Fe(3), three equivalent Fe(2), and four equivalent Fe(4) atoms. Al(1) is bonded in a distorted q6 geometry to two equivalent La(2) and eight equivalent La(1) atoms.
La6Fe13Al crystallizes in the tetragonal I4/mcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Fe(1), three equivalent Fe(2), and two equivalent Al(1) atoms. The La(1)-Fe(1) bond length is 3.04 Å. There are two shorter (3.18 Å) and one longer (3.38 Å) La(1)-Fe(2) bond length. Both La(1)-Al(1) bond lengths are 3.39 Å. In the second La site, La(2) is bonded in a 13-coordinate geometry to four equivalent Fe(1), four equivalent Fe(2), four equivalent Fe(4), and one Al(1) atom. All La(2)-Fe(1) bond lengths are 3.20 Å. All La(2)-Fe(2) bond lengths are 3.28 Å. All La(2)-Fe(4) bond lengths are 3.10 Å. The La(2)-Al(1) bond length is 3.39 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(2) is bonded to two equivalent La(2), three equivalent La(1), one Fe(2), one Fe(3), two equivalent Fe(4), and three equivalent Fe(1) atoms to form distorted FeLa5Fe7 cuboctahedra that share  a cornercorner with one Fe(3)Fe12 cuboctahedra, corners with three equivalent Fe(2)La5Fe7 cuboctahedra, corners with four equivalent Fe(4)La2Fe10 cuboctahedra,  a faceface with one Fe(3)Fe12 cuboctahedra, faces with six equivalent Fe(2)La5Fe7 cuboctahedra, and faces with eight equivalent Fe(4)La2Fe10 cuboctahedra. The Fe(2)-Fe(2) bond length is 2.58 Å. The Fe(2)-Fe(3) bond length is 2.54 Å. Both Fe(2)-Fe(4) bond lengths are 2.64 Å. There is one shorter (2.52 Å) and two longer (2.54 Å) Fe(2)-Fe(1) bond lengths. In the second Fe site, Fe(3) is bonded to four equivalent Fe(1), four equivalent Fe(2), and four equivalent Fe(4) atoms to form FeFe12 cuboctahedra that share corners with four equivalent Fe(4)La2Fe10 cuboctahedra, corners with four equivalent Fe(2)La5Fe7 cuboctahedra, faces with four equivalent Fe(2)La5Fe7 cuboctahedra, and faces with eight equivalent Fe(4)La2Fe10 cuboctahedra. All Fe(3)-Fe(1) bond lengths are 2.46 Å. All Fe(3)-Fe(4) bond lengths are 2.41 Å. In the third Fe site, Fe(4) is bonded to two equivalent La(2), one Fe(3), two equivalent Fe(2), three equivalent Fe(4), and four equivalent Fe(1) atoms to form FeLa2Fe10 cuboctahedra that share  a cornercorner with one Fe(3)Fe12 cuboctahedra, corners with three equivalent Fe(4)La2Fe10 cuboctahedra, corners with four equivalent Fe(2)La5Fe7 cuboctahedra, faces with two equivalent Fe(3)Fe12 cuboctahedra, faces with seven equivalent Fe(4)La2Fe10 cuboctahedra, and faces with eight equivalent Fe(2)La5Fe7 cuboctahedra. There are two shorter (2.51 Å) and one longer (2.56 Å) Fe(4)-Fe(4) bond length. There are two shorter (2.49 Å) and two longer (2.58 Å) Fe(4)-Fe(1) bond lengths. In the fourth Fe site, Fe(1) is bonded in a 12-coordinate geometry to one La(1), two equivalent La(2), one Fe(1), one Fe(3), three equivalent Fe(2), and four equivalent Fe(4) atoms. The Fe(1)-Fe(1) bond length is 2.75 Å. Al(1) is bonded in a distorted q6 geometry to two equivalent La(2) and eight equivalent La(1) atoms.