Pr3Ag4Sn4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to four equivalent Ag(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the second Pr site, Pr(2) is bonded to eight equivalent Ag(1), two equivalent Sn(1), and two equivalent Sn(2) atoms to form distorted face-sharing PrAg8Sn4 cuboctahedra. Ag(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Pr(2), two equivalent Pr(1), and four equivalent Ag(1) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Pr(2), two equivalent Pr(1), four equivalent Ag(1), and one Sn(2) atom.
Pr3Ag4Sn4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to four equivalent Ag(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. All Pr(1)-Ag(1) bond lengths are 3.30 Å. Both Pr(1)-Sn(1) bond lengths are 3.28 Å. Both Pr(1)-Sn(2) bond lengths are 3.38 Å. In the second Pr site, Pr(2) is bonded to eight equivalent Ag(1), two equivalent Sn(1), and two equivalent Sn(2) atoms to form distorted face-sharing PrAg8Sn4 cuboctahedra. All Pr(2)-Ag(1) bond lengths are 3.41 Å. Both Pr(2)-Sn(1) bond lengths are 3.35 Å. Both Pr(2)-Sn(2) bond lengths are 3.07 Å. Ag(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. Both Ag(1)-Sn(1) bond lengths are 2.95 Å. Both Ag(1)-Sn(2) bond lengths are 3.05 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to one Pr(2), two equivalent Pr(1), and four equivalent Ag(1) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Pr(2), two equivalent Pr(1), four equivalent Ag(1), and one Sn(2) atom. The Sn(2)-Sn(2) bond length is 2.77 Å.