Ca2Eu2In3Ge4 crystallizes in the monoclinic C2/m space group. Ca(1) is bonded in a 11-coordinate geometry to two equivalent In(1), three equivalent In(2), two equivalent Ge(2), and four equivalent Ge(1) atoms. Eu(1) is bonded in a 5-coordinate geometry to two equivalent In(1), two equivalent Ge(1), and three equivalent Ge(2) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to four equivalent Ca(1), four equivalent Eu(1), two equivalent Ge(1), and two equivalent Ge(2) atoms to form face-sharing InCa4Eu4Ge4 cuboctahedra. In the second In site, In(2) is bonded in a 4-coordinate geometry to three equivalent Ca(1), one Ge(1), and three 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 four equivalent Ca(1), two equivalent Eu(1), one In(1), one In(2), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ca(1), three equivalent Eu(1), one In(1), and three equivalent In(2) atoms.
Ca2Eu2In3Ge4 crystallizes in the monoclinic C2/m space group. Ca(1) is bonded in a 11-coordinate geometry to two equivalent In(1), three equivalent In(2), two equivalent Ge(2), and four equivalent Ge(1) atoms. Both Ca(1)-In(1) bond lengths are 3.54 Å. There are two shorter (3.45 Å) and one longer (3.50 Å) Ca(1)-In(2) bond length. Both Ca(1)-Ge(2) bond lengths are 3.37 Å. There are two shorter (3.17 Å) and two longer (3.29 Å) Ca(1)-Ge(1) bond lengths. Eu(1) is bonded in a 5-coordinate geometry to two equivalent In(1), two equivalent Ge(1), and three equivalent Ge(2) atoms. Both Eu(1)-In(1) bond lengths are 3.56 Å. Both Eu(1)-Ge(1) bond lengths are 3.17 Å. There are two shorter (3.20 Å) and one longer (3.24 Å) Eu(1)-Ge(2) bond length. There are two inequivalent In sites. In the first In site, In(1) is bonded to four equivalent Ca(1), four equivalent Eu(1), two equivalent Ge(1), and two equivalent Ge(2) atoms to form face-sharing InCa4Eu4Ge4 cuboctahedra. Both In(1)-Ge(1) bond lengths are 2.93 Å. Both In(1)-Ge(2) bond lengths are 3.13 Å. In the second In site, In(2) is bonded in a 4-coordinate geometry to three equivalent Ca(1), one Ge(1), and three equivalent Ge(2) atoms. The In(2)-Ge(1) bond length is 2.75 Å. There is one shorter (2.85 Å) and two longer (2.88 Å) In(2)-Ge(2) bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ca(1), two equivalent Eu(1), one In(1), one In(2), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.51 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ca(1), three equivalent Eu(1), one In(1), and three equivalent In(2) atoms.