PrCoAl4 crystallizes in the orthorhombic Pmma space group. Pr(1) is bonded in a 13-coordinate geometry to one Co(1), two equivalent Al(1), two equivalent Al(2), and eight equivalent Al(3) atoms. Co(1) is bonded in a 9-coordinate geometry to one Pr(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a linear geometry to two equivalent Pr(1), two equivalent Co(1), four equivalent Al(2), and four equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Co(1), four equivalent Al(1), and four equivalent Al(3) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to four equivalent Pr(1), two equivalent Co(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms.
PrCoAl4 crystallizes in the orthorhombic Pmma space group. Pr(1) is bonded in a 13-coordinate geometry to one Co(1), two equivalent Al(1), two equivalent Al(2), and eight equivalent Al(3) atoms. The Pr(1)-Co(1) bond length is 2.98 Å. Both Pr(1)-Al(1) bond lengths are 3.28 Å. Both Pr(1)-Al(2) bond lengths are 3.11 Å. There are four shorter (3.23 Å) and four longer (3.28 Å) Pr(1)-Al(3) bond lengths. Co(1) is bonded in a 9-coordinate geometry to one Pr(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms. Both Co(1)-Al(1) bond lengths are 2.29 Å. Both Co(1)-Al(2) bond lengths are 2.53 Å. All Co(1)-Al(3) bond lengths are 2.55 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a linear geometry to two equivalent Pr(1), two equivalent Co(1), four equivalent Al(2), and four equivalent Al(3) atoms. All Al(1)-Al(2) bond lengths are 2.79 Å. All Al(1)-Al(3) bond lengths are 2.91 Å. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Co(1), four equivalent Al(1), and four equivalent Al(3) atoms. There are two shorter (2.69 Å) and two longer (3.02 Å) Al(2)-Al(3) bond lengths. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to four equivalent Pr(1), two equivalent Co(1), two equivalent Al(1), two equivalent Al(2), and two equivalent Al(3) atoms. There is one shorter (2.73 Å) and one longer (3.04 Å) Al(3)-Al(3) bond length.