PrCo4B crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 18-coordinate geometry to twelve equivalent Co(1) and six equivalent B(1) atoms. In the second Pr site, Pr(2) is bonded in a 18-coordinate geometry to six equivalent Co(2) and twelve equivalent Co(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Co(2), and two equivalent B(1) atoms. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Pr(2) and six equivalent Co(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1) and six equivalent Co(1) atoms.
PrCo4B crystallizes in the hexagonal P6/mmm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 18-coordinate geometry to twelve equivalent Co(1) and six equivalent B(1) atoms. All Pr(1)-Co(1) bond lengths are 2.94 Å. All Pr(1)-B(1) bond lengths are 2.96 Å. In the second Pr site, Pr(2) is bonded in a 18-coordinate geometry to six equivalent Co(2) and twelve equivalent Co(1) atoms. All Pr(2)-Co(2) bond lengths are 2.96 Å. All Pr(2)-Co(1) bond lengths are 3.24 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Co(2), and two equivalent B(1) atoms. Both Co(1)-Co(2) bond lengths are 2.47 Å. Both Co(1)-B(1) bond lengths are 2.06 Å. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to three equivalent Pr(2) and six equivalent Co(1) atoms. B(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1) and six equivalent Co(1) atoms.