La5Sn4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to one Sn(2), two equivalent Sn(3), and three equivalent Sn(1) atoms. In the third La site, La(3) is bonded to two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form corner-sharing LaSn6 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. There are three inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent La(1), two equivalent La(3), four equivalent La(2), and one Sn(2) atom. In the second Sn site, Sn(1) is bonded in a 8-coordinate geometry to one La(3), three equivalent La(2), and four equivalent La(1) atoms. In the third Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent La(2), two equivalent La(3), four equivalent La(1), and one Sn(3) atom.
La5Sn4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. The La(1)-Sn(3) bond length is 3.54 Å. There is one shorter (3.37 Å) and one longer (3.56 Å) La(1)-Sn(2) bond length. There are a spread of La(1)-Sn(1) bond distances ranging from 3.33-4.05 Å. In the second La site, La(2) is bonded in a 6-coordinate geometry to one Sn(2), two equivalent Sn(3), and three equivalent Sn(1) atoms. The La(2)-Sn(2) bond length is 3.41 Å. There is one shorter (3.38 Å) and one longer (3.40 Å) La(2)-Sn(3) bond length. There are a spread of La(2)-Sn(1) bond distances ranging from 3.22-3.34 Å. In the third La site, La(3) is bonded to two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form corner-sharing LaSn6 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. Both La(3)-Sn(1) bond lengths are 3.37 Å. There is one shorter (3.33 Å) and one longer (3.49 Å) La(3)-Sn(2) bond length. There is one shorter (3.33 Å) and one longer (3.50 Å) La(3)-Sn(3) bond length. There are three inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent La(1), two equivalent La(3), four equivalent La(2), and one Sn(2) atom. The Sn(3)-Sn(2) bond length is 3.01 Å. In the second Sn site, Sn(1) is bonded in a 8-coordinate geometry to one La(3), three equivalent La(2), and four equivalent La(1) atoms. In the third Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent La(2), two equivalent La(3), four equivalent La(1), and one Sn(3) atom.