Pr2AgAl3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Ag(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms to form PrAl8Ag4 cuboctahedra that share edges with four equivalent Pr(1)Al8Ag4 cuboctahedra, edges with eight equivalent Pr(2)Al10Ag2 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. In the second Pr site, Pr(2) is bonded to two equivalent Ag(1), two equivalent Al(3), four equivalent Al(1), and four equivalent Al(2) atoms to form PrAl10Ag2 cuboctahedra that share edges with four equivalent Pr(2)Al10Ag2 cuboctahedra, edges with eight equivalent Pr(1)Al8Ag4 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Ag(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Ag(1), and two equivalent Al(1) atoms.
Pr2AgAl3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Ag(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms to form PrAl8Ag4 cuboctahedra that share edges with four equivalent Pr(1)Al8Ag4 cuboctahedra, edges with eight equivalent Pr(2)Al10Ag2 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. All Pr(1)-Ag(1) bond lengths are 3.32 Å. Both Pr(1)-Al(1) bond lengths are 3.27 Å. Both Pr(1)-Al(2) bond lengths are 3.35 Å. All Pr(1)-Al(3) bond lengths are 3.26 Å. In the second Pr site, Pr(2) is bonded to two equivalent Ag(1), two equivalent Al(3), four equivalent Al(1), and four equivalent Al(2) atoms to form PrAl10Ag2 cuboctahedra that share edges with four equivalent Pr(2)Al10Ag2 cuboctahedra, edges with eight equivalent Pr(1)Al8Ag4 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. Both Pr(2)-Ag(1) bond lengths are 3.33 Å. Both Pr(2)-Al(3) bond lengths are 3.26 Å. All Pr(2)-Al(1) bond lengths are 3.26 Å. All Pr(2)-Al(2) bond lengths are 3.31 Å. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(3), and two equivalent Al(2) atoms. The Ag(1)-Al(3) bond length is 2.70 Å. Both Ag(1)-Al(2) bond lengths are 2.67 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(1), four equivalent Pr(2), one Al(2), and two equivalent Al(3) atoms. The Al(1)-Al(2) bond length is 2.67 Å. Both Al(1)-Al(3) bond lengths are 2.70 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Ag(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Ag(1), and two equivalent Al(1) atoms.