Pr5CoSb2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, edge, and face-sharing PrCoSb4 trigonal bipyramids. In the second Pr site, Pr(2) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing PrCoSb4 trigonal bipyramids. In the third Pr site, Pr(3) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, edge, and face-sharing PrCoSb4 trigonal bipyramids. In the fourth Pr site, Pr(4) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Sb(1) atoms. Co(1) is bonded to one Pr(1), one Pr(2), one Pr(3), and four equivalent Pr(4) atoms to form distorted edge-sharing CoPr7 pentagonal bipyramids. Sb(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Pr(3), and three equivalent Pr(4) atoms.
Pr5CoSb2 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, edge, and face-sharing PrCoSb4 trigonal bipyramids. The Pr(1)-Co(1) bond length is 2.80 Å. There are two shorter (3.29 Å) and two longer (3.32 Å) Pr(1)-Sb(1) bond lengths. In the second Pr site, Pr(2) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing PrCoSb4 trigonal bipyramids. The Pr(2)-Co(1) bond length is 2.82 Å. There are two shorter (3.32 Å) and two longer (3.35 Å) Pr(2)-Sb(1) bond lengths. In the third Pr site, Pr(3) is bonded to one Co(1) and four equivalent Sb(1) atoms to form a mixture of distorted corner, edge, and face-sharing PrCoSb4 trigonal bipyramids. The Pr(3)-Co(1) bond length is 3.25 Å. All Pr(3)-Sb(1) bond lengths are 3.26 Å. In the fourth Pr site, Pr(4) is bonded in a 5-coordinate geometry to two equivalent Co(1) and three equivalent Sb(1) atoms. There is one shorter (2.89 Å) and one longer (2.99 Å) Pr(4)-Co(1) bond length. There are a spread of Pr(4)-Sb(1) bond distances ranging from 3.46-3.58 Å. Co(1) is bonded to one Pr(1), one Pr(2), one Pr(3), and four equivalent Pr(4) atoms to form distorted edge-sharing CoPr7 pentagonal bipyramids. Sb(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Pr(3), and three equivalent Pr(4) atoms.