PrBrCl2 crystallizes in the monoclinic Pm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one Br(1), one Br(2), one Cl(1), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to two equivalent Br(1), two equivalent Br(2), one Cl(2), one Cl(3), one Cl(4), and two equivalent Cl(1) atoms. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Br site, Br(2) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms.
PrBrCl2 crystallizes in the monoclinic Pm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 9-coordinate geometry to one Br(1), one Br(2), one Cl(1), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. The Pr(1)-Br(1) bond length is 3.09 Å. The Pr(1)-Br(2) bond length is 3.13 Å. The Pr(1)-Cl(1) bond length is 3.00 Å. Both Pr(1)-Cl(2) bond lengths are 2.92 Å. Both Pr(1)-Cl(3) bond lengths are 2.95 Å. Both Pr(1)-Cl(4) bond lengths are 2.91 Å. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to two equivalent Br(1), two equivalent Br(2), one Cl(2), one Cl(3), one Cl(4), and two equivalent Cl(1) atoms. Both Pr(2)-Br(1) bond lengths are 3.07 Å. Both Pr(2)-Br(2) bond lengths are 3.05 Å. The Pr(2)-Cl(2) bond length is 3.06 Å. The Pr(2)-Cl(3) bond length is 2.98 Å. The Pr(2)-Cl(4) bond length is 2.94 Å. Both Pr(2)-Cl(1) bond lengths are 2.93 Å. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Br site, Br(2) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a trigonal non-coplanar geometry to one Pr(1) and two equivalent Pr(2) atoms. In the second Cl site, Cl(2) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the third Cl site, Cl(3) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms. In the fourth Cl site, Cl(4) is bonded in a trigonal non-coplanar geometry to one Pr(2) and two equivalent Pr(1) atoms.