Pr(AlGe)2 crystallizes in the trigonal P-3m1 space group. Pr(1) is bonded to six equivalent Ge(1) atoms to form distorted PrGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Pr(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Pr(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Pr(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-53°. Ge(1) is bonded in a 7-coordinate geometry to three equivalent Pr(1) and four equivalent Al(1) atoms.
Pr(AlGe)2 crystallizes in the trigonal P-3m1 space group. Pr(1) is bonded to six equivalent Ge(1) atoms to form distorted PrGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Pr(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. All Pr(1)-Ge(1) bond lengths are 3.10 Å. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Pr(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Pr(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-53°. There are three shorter (2.54 Å) and one longer (2.56 Å) Al(1)-Ge(1) bond length. Ge(1) is bonded in a 7-coordinate geometry to three equivalent Pr(1) and four equivalent Al(1) atoms.