Eu(PtGe)2 crystallizes in the monoclinic P2_1/c space group. Eu(1) is bonded in a 18-coordinate geometry to four equivalent Pt(1), five equivalent Pt(2), four equivalent Ge(1), and five equivalent Ge(2) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 6-coordinate geometry to four equivalent Eu(1) and four equivalent Ge(2) atoms. In the second Pt site, Pt(2) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Pt(2) atoms. In the second Ge site, Ge(2) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Pt(2), and four equivalent Pt(1) atoms.
Eu(PtGe)2 crystallizes in the monoclinic P2_1/c space group. Eu(1) is bonded in a 18-coordinate geometry to four equivalent Pt(1), five equivalent Pt(2), four equivalent Ge(1), and five equivalent Ge(2) atoms. There are a spread of Eu(1)-Pt(1) bond distances ranging from 3.33-3.74 Å. There are a spread of Eu(1)-Pt(2) bond distances ranging from 3.47-3.81 Å. There are three shorter (3.44 Å) and one longer (3.48 Å) Eu(1)-Ge(1) bond length. There are a spread of Eu(1)-Ge(2) bond distances ranging from 3.35-3.86 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 6-coordinate geometry to four equivalent Eu(1) and four equivalent Ge(2) atoms. There are a spread of Pt(1)-Ge(2) bond distances ranging from 2.62-2.73 Å. In the second Pt site, Pt(2) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Ge(2), and four equivalent Ge(1) atoms. The Pt(2)-Ge(2) bond length is 2.66 Å. There are a spread of Pt(2)-Ge(1) bond distances ranging from 2.67-2.69 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to four equivalent Eu(1) and four equivalent Pt(2) atoms. In the second Ge site, Ge(2) is bonded in a 5-coordinate geometry to five equivalent Eu(1), one Pt(2), and four equivalent Pt(1) atoms.