PrB4O8Cl crystallizes in the monoclinic Cc space group. Pr(1) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent Cl(1) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(6) atom. In the second B site, B(2) is bonded to one O(1), one O(5), one O(6), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the third B site, B(3) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(5) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(2), and one B(4) atom. In the second O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one B(3) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to one Pr(1) and one B(2) atom. In the fifth O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(2), and one B(3) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(3), and one B(4) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(3) atom. In the eighth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(4) atom. Cl(1) is bonded in a bent 120 degrees geometry to two equivalent Pr(1) atoms.
PrB4O8Cl crystallizes in the monoclinic Cc space group. Pr(1) is bonded in a 10-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and two equivalent Cl(1) atoms. The Pr(1)-O(1) bond length is 2.64 Å. The Pr(1)-O(2) bond length is 2.67 Å. The Pr(1)-O(3) bond length is 2.59 Å. The Pr(1)-O(4) bond length is 2.81 Å. The Pr(1)-O(5) bond length is 2.72 Å. The Pr(1)-O(6) bond length is 2.63 Å. The Pr(1)-O(7) bond length is 2.44 Å. The Pr(1)-O(8) bond length is 2.45 Å. There is one shorter (2.87 Å) and one longer (2.90 Å) Pr(1)-Cl(1) bond length. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(6) atom. The B(1)-O(3) bond length is 1.37 Å. The B(1)-O(4) bond length is 1.40 Å. The B(1)-O(6) bond length is 1.37 Å. In the second B site, B(2) is bonded to one O(1), one O(5), one O(6), and one O(8) atom to form corner-sharing BO4 tetrahedra. The B(2)-O(1) bond length is 1.48 Å. The B(2)-O(5) bond length is 1.47 Å. The B(2)-O(6) bond length is 1.50 Å. The B(2)-O(8) bond length is 1.44 Å. In the third B site, B(3) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form corner-sharing BO4 tetrahedra. The B(3)-O(1) bond length is 1.48 Å. The B(3)-O(2) bond length is 1.47 Å. The B(3)-O(3) bond length is 1.48 Å. The B(3)-O(7) bond length is 1.45 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(5) atom. The B(4)-O(2) bond length is 1.37 Å. The B(4)-O(4) bond length is 1.39 Å. The B(4)-O(5) bond length is 1.37 Å. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(2), and one B(4) atom. In the second O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one B(3) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to one Pr(1) and one B(2) atom. In the fifth O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(2), and one B(3) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(3), and one B(4) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(3) atom. In the eighth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Pr(1), one B(1), and one B(4) atom. Cl(1) is bonded in a bent 120 degrees geometry to two equivalent Pr(1) atoms.