Pr3Zn11 crystallizes in the orthorhombic Immm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 16-coordinate geometry to four equivalent Zn(2), four equivalent Zn(4), and eight equivalent Zn(3) atoms. In the second Pr site, Pr(2) is bonded in a 16-coordinate geometry to two equivalent Zn(1), two equivalent Zn(2), six equivalent Zn(3), and six equivalent Zn(4) atoms. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Pr(2), four equivalent Zn(2), and four equivalent Zn(4) atoms to form distorted face-sharing ZnPr4Zn8 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Pr(1), two equivalent Pr(2), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(4) atoms to form a mixture of distorted corner, edge, and face-sharing ZnPr4Zn8 cuboctahedra. In the third Zn site, Zn(3) is bonded in a 10-coordinate geometry to two equivalent Pr(1), three equivalent Pr(2), one Zn(2), one Zn(3), and three equivalent Zn(4) atoms. In the fourth Zn site, Zn(4) is bonded in a 10-coordinate geometry to one Pr(1), three equivalent Pr(2), one Zn(1), two equivalent Zn(2), and three equivalent Zn(3) atoms.
Pr3Zn11 crystallizes in the orthorhombic Immm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 16-coordinate geometry to four equivalent Zn(2), four equivalent Zn(4), and eight equivalent Zn(3) atoms. All Pr(1)-Zn(2) bond lengths are 3.54 Å. All Pr(1)-Zn(4) bond lengths are 3.13 Å. All Pr(1)-Zn(3) bond lengths are 3.37 Å. In the second Pr site, Pr(2) is bonded in a 16-coordinate geometry to two equivalent Zn(1), two equivalent Zn(2), six equivalent Zn(3), and six equivalent Zn(4) atoms. Both Pr(2)-Zn(1) bond lengths are 3.49 Å. Both Pr(2)-Zn(2) bond lengths are 3.20 Å. There are four shorter (3.19 Å) and two longer (3.28 Å) Pr(2)-Zn(3) bond lengths. There are four shorter (3.11 Å) and two longer (3.35 Å) Pr(2)-Zn(4) bond lengths. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to four equivalent Pr(2), four equivalent Zn(2), and four equivalent Zn(4) atoms to form distorted face-sharing ZnPr4Zn8 cuboctahedra. All Zn(1)-Zn(2) bond lengths are 2.88 Å. All Zn(1)-Zn(4) bond lengths are 2.69 Å. In the second Zn site, Zn(2) is bonded to two equivalent Pr(1), two equivalent Pr(2), two equivalent Zn(1), two equivalent Zn(3), and four equivalent Zn(4) atoms to form a mixture of distorted corner, edge, and face-sharing ZnPr4Zn8 cuboctahedra. Both Zn(2)-Zn(3) bond lengths are 2.60 Å. All Zn(2)-Zn(4) bond lengths are 2.91 Å. In the third Zn site, Zn(3) is bonded in a 10-coordinate geometry to two equivalent Pr(1), three equivalent Pr(2), one Zn(2), one Zn(3), and three equivalent Zn(4) atoms. The Zn(3)-Zn(3) bond length is 2.53 Å. There are two shorter (2.61 Å) and one longer (2.78 Å) Zn(3)-Zn(4) bond length. In the fourth Zn site, Zn(4) is bonded in a 10-coordinate geometry to one Pr(1), three equivalent Pr(2), one Zn(1), two equivalent Zn(2), and three equivalent Zn(3) atoms.