Er5La5Ge6 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 6-coordinate geometry to one Ge(1), one Ge(3), two equivalent Ge(2), and two equivalent Ge(4) atoms. In the second Er site, Er(2) is bonded in a 5-coordinate geometry to one Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one Ge(1), two equivalent Ge(2), and two equivalent Ge(4) atoms. In the second La site, La(2) is bonded in a 5-coordinate geometry to one Ge(3), two equivalent Ge(1), and two equivalent Ge(4) atoms. In the third La site, La(3) is bonded in a 5-coordinate geometry to one Ge(3), two equivalent Ge(2), and two equivalent Ge(4) atoms. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(1), two equivalent La(1), and two equivalent La(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(1), two equivalent La(1), and two equivalent La(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Er(2), four equivalent Er(1), one La(2), and two equivalent La(3) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to four equivalent Er(1), one La(2), two equivalent La(1), and two equivalent La(3) atoms.
Er5La5Ge6 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 6-coordinate geometry to one Ge(1), one Ge(3), two equivalent Ge(2), and two equivalent Ge(4) atoms. The Er(1)-Ge(1) bond length is 3.12 Å. The Er(1)-Ge(3) bond length is 3.13 Å. There is one shorter (3.13 Å) and one longer (3.23 Å) Er(1)-Ge(2) bond length. There is one shorter (3.15 Å) and one longer (3.19 Å) Er(1)-Ge(4) bond length. In the second Er site, Er(2) is bonded in a 5-coordinate geometry to one Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. The Er(2)-Ge(1) bond length is 3.03 Å. Both Er(2)-Ge(2) bond lengths are 2.96 Å. Both Er(2)-Ge(3) bond lengths are 3.50 Å. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one Ge(1), two equivalent Ge(2), and two equivalent Ge(4) atoms. The La(1)-Ge(1) bond length is 3.08 Å. There is one shorter (3.05 Å) and one longer (3.16 Å) La(1)-Ge(2) bond length. Both La(1)-Ge(4) bond lengths are 3.51 Å. In the second La site, La(2) is bonded in a 5-coordinate geometry to one Ge(3), two equivalent Ge(1), and two equivalent Ge(4) atoms. The La(2)-Ge(3) bond length is 3.11 Å. Both La(2)-Ge(1) bond lengths are 3.52 Å. Both La(2)-Ge(4) bond lengths are 3.03 Å. In the third La site, La(3) is bonded in a 5-coordinate geometry to one Ge(3), two equivalent Ge(2), and two equivalent Ge(4) atoms. The La(3)-Ge(3) bond length is 3.03 Å. Both La(3)-Ge(2) bond lengths are 3.49 Å. There is one shorter (3.05 Å) and one longer (3.13 Å) La(3)-Ge(4) bond length. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(1), two equivalent La(1), and two equivalent La(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(1), two equivalent La(1), and two equivalent La(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Er(2), four equivalent Er(1), one La(2), and two equivalent La(3) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to four equivalent Er(1), one La(2), two equivalent La(1), and two equivalent La(3) atoms.