Pr2Sn5 crystallizes in the monoclinic P2/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms to form a mixture of face and corner-sharing PrSn12 cuboctahedra. In the second Pr site, Pr(2) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(5), and six equivalent Sn(2) atoms. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(4), and four equivalent Sn(5) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to six equivalent Pr(2) and two equivalent Sn(2) atoms. In the third Sn site, Sn(3) is bonded in a distorted square co-planar geometry to four equivalent Pr(1) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted square co-planar geometry to four equivalent Pr(1), two equivalent Sn(1), and two equivalent Sn(5) atoms. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(4), and four equivalent Sn(1) atoms. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to four equivalent Pr(1) atoms.
Pr2Sn5 crystallizes in the monoclinic P2/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent Sn(1), two equivalent Sn(3), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms to form a mixture of face and corner-sharing PrSn12 cuboctahedra. Both Pr(1)-Sn(1) bond lengths are 3.37 Å. Both Pr(1)-Sn(3) bond lengths are 3.37 Å. Both Pr(1)-Sn(5) bond lengths are 3.41 Å. Both Pr(1)-Sn(6) bond lengths are 3.40 Å. There are two shorter (3.29 Å) and two longer (3.30 Å) Pr(1)-Sn(4) bond lengths. In the second Pr site, Pr(2) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(5), and six equivalent Sn(2) atoms. Both Pr(2)-Sn(1) bond lengths are 3.29 Å. Both Pr(2)-Sn(5) bond lengths are 3.31 Å. There are four shorter (3.37 Å) and two longer (3.58 Å) Pr(2)-Sn(2) bond lengths. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(4), and four equivalent Sn(5) atoms. Both Sn(1)-Sn(4) bond lengths are 3.30 Å. There are two shorter (3.29 Å) and two longer (3.30 Å) Sn(1)-Sn(5) bond lengths. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to six equivalent Pr(2) and two equivalent Sn(2) atoms. There is one shorter (3.03 Å) and one longer (3.04 Å) Sn(2)-Sn(2) bond length. In the third Sn site, Sn(3) is bonded in a distorted square co-planar geometry to four equivalent Pr(1) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted square co-planar geometry to four equivalent Pr(1), two equivalent Sn(1), and two equivalent Sn(5) atoms. There is one shorter (3.28 Å) and one longer (3.29 Å) Sn(4)-Sn(5) bond length. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(4), and four equivalent Sn(1) atoms. In the sixth Sn site, Sn(6) is bonded in a 4-coordinate geometry to four equivalent Pr(1) atoms.