La6Co13Sn 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 13-coordinate geometry to four equivalent Co(2), four equivalent Co(3), four equivalent Co(4), and one Sn(1) atom. In the second La site, La(2) is bonded in a 6-coordinate geometry to one Co(3), three equivalent Co(4), and two equivalent Sn(1) atoms. There are four inequivalent Co sites. In the first Co site, Co(3) is bonded to one La(2), two equivalent La(1), one Co(1), one Co(3), three equivalent Co(4), and four equivalent Co(2) atoms to form distorted CoLa3Co9 cuboctahedra that share corners with seven equivalent Co(3)La3Co9 cuboctahedra, edges with four equivalent Co(2)La2Co10 cuboctahedra, faces with two equivalent Co(1)Co12 cuboctahedra, faces with six equivalent Co(2)La2Co10 cuboctahedra, and faces with six equivalent Co(3)La3Co9 cuboctahedra. In the second Co site, Co(4) is bonded in a distorted q6 geometry to two equivalent La(1), three equivalent La(2), one Co(1), one Co(4), two equivalent Co(2), and three equivalent Co(3) atoms. In the third Co site, Co(1) is bonded to four equivalent Co(2), four equivalent Co(3), and four equivalent Co(4) atoms to form CoCo12 cuboctahedra that share corners with four equivalent Co(2)La2Co10 cuboctahedra, faces with eight equivalent Co(2)La2Co10 cuboctahedra, and faces with eight equivalent Co(3)La3Co9 cuboctahedra. In the fourth Co site, Co(2) is bonded to two equivalent La(1), one Co(1), two equivalent Co(4), three equivalent Co(2), and four equivalent Co(3) atoms to form CoLa2Co10 cuboctahedra that share  a cornercorner with one Co(1)Co12 cuboctahedra, corners with three equivalent Co(2)La2Co10 cuboctahedra, edges with four equivalent Co(3)La3Co9 cuboctahedra, faces with two equivalent Co(1)Co12 cuboctahedra, faces with six equivalent Co(3)La3Co9 cuboctahedra, and faces with seven equivalent Co(2)La2Co10 cuboctahedra. Sn(1) is bonded in a distorted q6 geometry to two equivalent La(1) and eight equivalent La(2) atoms.
La6Co13Sn 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 13-coordinate geometry to four equivalent Co(2), four equivalent Co(3), four equivalent Co(4), and one Sn(1) atom. All La(1)-Co(2) bond lengths are 2.93 Å. All La(1)-Co(3) bond lengths are 3.14 Å. All La(1)-Co(4) bond lengths are 3.26 Å. The La(1)-Sn(1) bond length is 3.45 Å. In the second La site, La(2) is bonded in a 6-coordinate geometry to one Co(3), three equivalent Co(4), and two equivalent Sn(1) atoms. The La(2)-Co(3) bond length is 2.88 Å. There are two shorter (3.10 Å) and one longer (3.33 Å) La(2)-Co(4) bond length. Both La(2)-Sn(1) bond lengths are 3.42 Å. There are four inequivalent Co sites. In the first Co site, Co(3) is bonded to one La(2), two equivalent La(1), one Co(1), one Co(3), three equivalent Co(4), and four equivalent Co(2) atoms to form distorted CoLa3Co9 cuboctahedra that share corners with seven equivalent Co(3)La3Co9 cuboctahedra, edges with four equivalent Co(2)La2Co10 cuboctahedra, faces with two equivalent Co(1)Co12 cuboctahedra, faces with six equivalent Co(2)La2Co10 cuboctahedra, and faces with six equivalent Co(3)La3Co9 cuboctahedra. The Co(3)-Co(1) bond length is 2.39 Å. The Co(3)-Co(3) bond length is 2.58 Å. There are two shorter (2.50 Å) and one longer (2.51 Å) Co(3)-Co(4) bond length. There are two shorter (2.47 Å) and two longer (2.49 Å) Co(3)-Co(2) bond lengths. In the second Co site, Co(4) is bonded in a distorted q6 geometry to two equivalent La(1), three equivalent La(2), one Co(1), one Co(4), two equivalent Co(2), and three equivalent Co(3) atoms. The Co(4)-Co(1) bond length is 2.41 Å. The Co(4)-Co(4) bond length is 2.58 Å. Both Co(4)-Co(2) bond lengths are 2.50 Å. In the third Co site, Co(1) is bonded to four equivalent Co(2), four equivalent Co(3), and four equivalent Co(4) atoms to form CoCo12 cuboctahedra that share corners with four equivalent Co(2)La2Co10 cuboctahedra, faces with eight equivalent Co(2)La2Co10 cuboctahedra, and faces with eight equivalent Co(3)La3Co9 cuboctahedra. All Co(1)-Co(2) bond lengths are 2.36 Å. In the fourth Co site, Co(2) is bonded to two equivalent La(1), one Co(1), two equivalent Co(4), three equivalent Co(2), and four equivalent Co(3) atoms to form CoLa2Co10 cuboctahedra that share  a cornercorner with one Co(1)Co12 cuboctahedra, corners with three equivalent Co(2)La2Co10 cuboctahedra, edges with four equivalent Co(3)La3Co9 cuboctahedra, faces with two equivalent Co(1)Co12 cuboctahedra, faces with six equivalent Co(3)La3Co9 cuboctahedra, and faces with seven equivalent Co(2)La2Co10 cuboctahedra. There is one shorter (2.52 Å) and two longer (2.55 Å) Co(2)-Co(2) bond lengths. Sn(1) is bonded in a distorted q6 geometry to two equivalent La(1) and eight equivalent La(2) atoms.