Pr5Sn4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one Sn(3), two equivalent Sn(2), and three equivalent Sn(1) atoms. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to one Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. In the third Pr site, Pr(3) is bonded to two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form corner-sharing PrSn6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. There are three inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Sn(2) atom. In the second Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Sn(3) atom.
Pr5Sn4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one Sn(3), two equivalent Sn(2), and three equivalent Sn(1) atoms. The Pr(1)-Sn(3) bond length is 3.39 Å. There is one shorter (3.27 Å) and one longer (3.30 Å) Pr(1)-Sn(2) bond length. There are a spread of Pr(1)-Sn(1) bond distances ranging from 3.16-3.31 Å. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to one Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. The Pr(2)-Sn(2) bond length is 3.55 Å. There is one shorter (3.30 Å) and one longer (3.52 Å) Pr(2)-Sn(3) bond length. There are a spread of Pr(2)-Sn(1) bond distances ranging from 3.30-3.86 Å. In the third Pr site, Pr(3) is bonded to two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form corner-sharing PrSn6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. Both Pr(3)-Sn(1) bond lengths are 3.36 Å. There is one shorter (3.25 Å) and one longer (3.44 Å) Pr(3)-Sn(2) bond length. There is one shorter (3.23 Å) and one longer (3.37 Å) Pr(3)-Sn(3) bond length. There are three inequivalent Sn sites. In the first Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Sn(2) atom. The Sn(3)-Sn(2) bond length is 3.06 Å. In the second Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Sn(3) atom.