Eu2ZnGe3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 12-coordinate geometry to two equivalent Zn(1), two equivalent Ge(1), and eight equivalent Ge(2) atoms. In the second Eu site, Eu(2) is bonded in a 12-coordinate geometry to four equivalent Zn(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. Zn(1) is bonded in a 3-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Ge(1), and two equivalent Ge(2) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Zn(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Zn(1), one Ge(1), and one Ge(2) atom.
Eu2ZnGe3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 12-coordinate geometry to two equivalent Zn(1), two equivalent Ge(1), and eight equivalent Ge(2) atoms. There is one shorter (3.19 Å) and one longer (3.49 Å) Eu(1)-Zn(1) bond length. There is one shorter (3.12 Å) and one longer (3.42 Å) Eu(1)-Ge(1) bond length. There are a spread of Eu(1)-Ge(2) bond distances ranging from 3.15-3.45 Å. In the second Eu site, Eu(2) is bonded in a 12-coordinate geometry to four equivalent Zn(1), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two shorter (3.14 Å) and two longer (3.45 Å) Eu(2)-Zn(1) bond lengths. There are two shorter (3.12 Å) and two longer (3.44 Å) Eu(2)-Ge(1) bond lengths. There are two shorter (3.13 Å) and two longer (3.41 Å) Eu(2)-Ge(2) bond lengths. Zn(1) is bonded in a 3-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Ge(1), and two equivalent Ge(2) atoms. The Zn(1)-Ge(1) bond length is 2.43 Å. Both Zn(1)-Ge(2) bond lengths are 2.40 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Eu(1), four equivalent Eu(2), one Zn(1), and two equivalent Ge(2) atoms. Both Ge(1)-Ge(2) bond lengths are 2.50 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Zn(1), one Ge(1), and one Ge(2) atom. The Ge(2)-Ge(2) bond length is 2.48 Å.