La15Ge9Fe crystallizes in the hexagonal P6_3mc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of distorted edge, corner, and face-sharing LaGe6 octahedra. The corner-sharing octahedral tilt angles range from 31-36°. In the second La site, La(2) is bonded in a 4-coordinate geometry to one Fe(1), two equivalent Ge(3), and three equivalent Ge(2) atoms. In the third La site, La(3) is bonded in a 5-coordinate geometry to one Fe(1), one Ge(1), one Ge(3), and two equivalent Ge(2) atoms. In the fourth La site, La(4) is bonded in a 4-coordinate geometry to one Ge(3) and three equivalent Ge(1) atoms. Fe(1) is bonded in an octahedral geometry to three equivalent La(2) and three equivalent La(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one La(3), three equivalent La(4), and four equivalent La(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent La(3), three equivalent La(2), and four equivalent La(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one La(3), one La(4), two equivalent La(2), and four equivalent La(1) atoms.
La15Ge9Fe crystallizes in the hexagonal P6_3mc space group. There are four inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of distorted edge, corner, and face-sharing LaGe6 octahedra. The corner-sharing octahedral tilt angles range from 31-36°. There is one shorter (3.28 Å) and one longer (3.35 Å) La(1)-Ge(1) bond length. There is one shorter (3.24 Å) and one longer (3.29 Å) La(1)-Ge(2) bond length. There is one shorter (3.20 Å) and one longer (3.35 Å) La(1)-Ge(3) bond length. In the second La site, La(2) is bonded in a 4-coordinate geometry to one Fe(1), two equivalent Ge(3), and three equivalent Ge(2) atoms. The La(2)-Fe(1) bond length is 2.72 Å. Both La(2)-Ge(3) bond lengths are 3.19 Å. There are a spread of La(2)-Ge(2) bond distances ranging from 3.18-3.95 Å. In the third La site, La(3) is bonded in a 5-coordinate geometry to one Fe(1), one Ge(1), one Ge(3), and two equivalent Ge(2) atoms. The La(3)-Fe(1) bond length is 2.74 Å. The La(3)-Ge(1) bond length is 3.26 Å. The La(3)-Ge(3) bond length is 3.35 Å. Both La(3)-Ge(2) bond lengths are 3.17 Å. In the fourth La site, La(4) is bonded in a 4-coordinate geometry to one Ge(3) and three equivalent Ge(1) atoms. The La(4)-Ge(3) bond length is 3.12 Å. There are two shorter (3.13 Å) and one longer (3.39 Å) La(4)-Ge(1) bond length. Fe(1) is bonded in an octahedral geometry to three equivalent La(2) and three equivalent La(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to one La(3), three equivalent La(4), and four equivalent La(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent La(3), three equivalent La(2), and four equivalent La(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to one La(3), one La(4), two equivalent La(2), and four equivalent La(1) atoms.