Pr2Co14Al3 crystallizes in the trigonal R-3m space group. Pr(1) is bonded in a 19-coordinate geometry to one Co(3), six equivalent Co(1), nine equivalent Co(2), and three equivalent Al(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and two equivalent Al(1) atoms. In the second Co site, Co(2) is bonded to three equivalent Pr(1), one Co(3), two equivalent Co(2), four equivalent Co(1), and two equivalent Al(1) atoms to form a mixture of distorted corner, edge, and face-sharing CoPr3Al2Co7 cuboctahedra. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to one Pr(1), one Co(3), three equivalent Co(2), six equivalent Co(1), and three equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Co(3), four equivalent Co(1), and four equivalent Co(2) atoms.
Pr2Co14Al3 crystallizes in the trigonal R-3m space group. Pr(1) is bonded in a 19-coordinate geometry to one Co(3), six equivalent Co(1), nine equivalent Co(2), and three equivalent Al(1) atoms. The Pr(1)-Co(3) bond length is 3.12 Å. All Pr(1)-Co(1) bond lengths are 3.03 Å. There are a spread of Pr(1)-Co(2) bond distances ranging from 3.02-3.22 Å. All Pr(1)-Al(1) bond lengths are 3.28 Å. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Co(1), two equivalent Co(3), four equivalent Co(2), and two equivalent Al(1) atoms. Both Co(1)-Co(1) bond lengths are 2.42 Å. Both Co(1)-Co(3) bond lengths are 2.67 Å. There are two shorter (2.53 Å) and two longer (2.65 Å) Co(1)-Co(2) bond lengths. Both Co(1)-Al(1) bond lengths are 2.42 Å. In the second Co site, Co(2) is bonded to three equivalent Pr(1), one Co(3), two equivalent Co(2), four equivalent Co(1), and two equivalent Al(1) atoms to form a mixture of distorted corner, edge, and face-sharing CoPr3Al2Co7 cuboctahedra. The Co(2)-Co(3) bond length is 2.67 Å. Both Co(2)-Co(2) bond lengths are 2.43 Å. Both Co(2)-Al(1) bond lengths are 2.45 Å. In the third Co site, Co(3) is bonded in a 14-coordinate geometry to one Pr(1), one Co(3), three equivalent Co(2), six equivalent Co(1), and three equivalent Al(1) atoms. The Co(3)-Co(3) bond length is 2.29 Å. All Co(3)-Al(1) bond lengths are 2.60 Å. Al(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Co(3), four equivalent Co(1), and four equivalent Co(2) atoms.