Eu(PtGe3)4 crystallizes in the cubic Im-3 space group. Eu(1) is bonded to twelve equivalent Ge(1) atoms to form EuGe12 cuboctahedra that share faces with eight equivalent Pt(1)Ge6 octahedra. Pt(1) is bonded to six equivalent Ge(1) atoms to form PtGe6 octahedra that share corners with six equivalent Pt(1)Ge6 octahedra and faces with two equivalent Eu(1)Ge12 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. Ge(1) is bonded in a 5-coordinate geometry to one Eu(1), two equivalent Pt(1), and two equivalent Ge(1) atoms.
Eu(PtGe3)4 crystallizes in the cubic Im-3 space group. Eu(1) is bonded to twelve equivalent Ge(1) atoms to form EuGe12 cuboctahedra that share faces with eight equivalent Pt(1)Ge6 octahedra. All Eu(1)-Ge(1) bond lengths are 3.39 Å. Pt(1) is bonded to six equivalent Ge(1) atoms to form PtGe6 octahedra that share corners with six equivalent Pt(1)Ge6 octahedra and faces with two equivalent Eu(1)Ge12 cuboctahedra. The corner-sharing octahedral tilt angles are 60°. All Pt(1)-Ge(1) bond lengths are 2.54 Å. Ge(1) is bonded in a 5-coordinate geometry to one Eu(1), two equivalent Pt(1), and two equivalent Ge(1) atoms. There is one shorter (2.58 Å) and one longer (2.66 Å) Ge(1)-Ge(1) bond length.