Pr2Al3Ge crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Ge(1) atoms to form PrAl10Ge2 cuboctahedra that share edges with four equivalent Pr(1)Al10Ge2 cuboctahedra, edges with eight equivalent Pr(2)Al8Ge4 cuboctahedra, faces with four equivalent Pr(1)Al10Ge2 cuboctahedra, and faces with four equivalent Pr(2)Al8Ge4 cuboctahedra. In the second Pr site, Pr(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Ge(1) atoms to form PrAl8Ge4 cuboctahedra that share edges with four equivalent Pr(2)Al8Ge4 cuboctahedra, edges with eight equivalent Pr(1)Al10Ge2 cuboctahedra, faces with four equivalent Pr(1)Al10Ge2 cuboctahedra, and faces with four equivalent Pr(2)Al8Ge4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(1), and two equivalent Ge(1) atoms. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Al(1), and one Ge(1) atom. Ge(1) is bonded in a distorted trigonal planar geometry to two equivalent Pr(1), four equivalent Pr(2), one Al(3), and two equivalent Al(2) atoms.
Pr2Al3Ge crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Ge(1) atoms to form PrAl10Ge2 cuboctahedra that share edges with four equivalent Pr(1)Al10Ge2 cuboctahedra, edges with eight equivalent Pr(2)Al8Ge4 cuboctahedra, faces with four equivalent Pr(1)Al10Ge2 cuboctahedra, and faces with four equivalent Pr(2)Al8Ge4 cuboctahedra. Both Pr(1)-Al(3) bond lengths are 3.35 Å. All Pr(1)-Al(1) bond lengths are 3.33 Å. All Pr(1)-Al(2) bond lengths are 3.30 Å. Both Pr(1)-Ge(1) bond lengths are 3.30 Å. In the second Pr site, Pr(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Ge(1) atoms to form PrAl8Ge4 cuboctahedra that share edges with four equivalent Pr(2)Al8Ge4 cuboctahedra, edges with eight equivalent Pr(1)Al10Ge2 cuboctahedra, faces with four equivalent Pr(1)Al10Ge2 cuboctahedra, and faces with four equivalent Pr(2)Al8Ge4 cuboctahedra. Both Pr(2)-Al(1) bond lengths are 3.33 Å. Both Pr(2)-Al(2) bond lengths are 3.29 Å. All Pr(2)-Al(3) bond lengths are 3.32 Å. All Pr(2)-Ge(1) bond lengths are 3.29 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(2), and two equivalent Al(3) atoms. The Al(1)-Al(2) bond length is 2.52 Å. Both Al(1)-Al(3) bond lengths are 2.50 Å. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(1), and two equivalent Ge(1) atoms. Both Al(2)-Ge(1) bond lengths are 2.51 Å. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Al(1), and one Ge(1) atom. The Al(3)-Ge(1) bond length is 2.48 Å. Ge(1) is bonded in a distorted trigonal planar geometry to two equivalent Pr(1), four equivalent Pr(2), one Al(3), and two equivalent Al(2) atoms.