Pr4Ni7In8 is beta Plutonium-derived structured and crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 2-coordinate geometry to two equivalent Ni(2), four equivalent Ni(1), two equivalent In(4), and four equivalent In(6) atoms. In the second Pr site, Pr(2) is bonded in a 13-coordinate geometry to one Ni(4), two equivalent Ni(1), one In(2), one In(7), two equivalent In(1), two equivalent In(6), and four equivalent In(3) atoms. In the third Pr site, Pr(3) is bonded in a 18-coordinate geometry to two equivalent Ni(3), four equivalent Ni(2), four equivalent Ni(4), two equivalent In(3), two equivalent In(5), two equivalent In(6), and two equivalent In(7) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 10-coordinate geometry to two equivalent Pr(3), four equivalent Ni(2), two equivalent In(5), and two equivalent In(6) atoms. In the second Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Pr(2), two equivalent Pr(3), one Ni(2), one In(7), two equivalent In(3), and two equivalent In(6) atoms. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Ni(1), one In(1), one In(4), one In(6), and two equivalent In(2) atoms. In the fourth Ni site, Ni(2) is bonded in a 10-coordinate geometry to one Pr(1), two equivalent Pr(3), one Ni(2), one Ni(4), two equivalent Ni(3), one In(5), and two equivalent In(6) atoms. There are seven inequivalent In sites. In the first In site, In(1) is bonded in a 12-coordinate geometry to four equivalent Pr(2), two equivalent Ni(1), two equivalent In(2), two equivalent In(3), and two equivalent In(7) atoms. In the second In site, In(2) is bonded in a 4-coordinate geometry to two equivalent Pr(2), four equivalent Ni(1), two equivalent In(1), and two equivalent In(4) atoms. In the third In site, In(3) is bonded in a 12-coordinate geometry to one Pr(3), four equivalent Pr(2), two equivalent Ni(4), one In(1), one In(3), one In(6), and two equivalent In(7) atoms. In the fourth In site, In(4) is bonded to four equivalent Pr(1), four equivalent Ni(1), and four equivalent In(2) atoms to form distorted face-sharing InPr4In4Ni4 cuboctahedra. In the fifth In site, In(5) is bonded to four equivalent Pr(3), four equivalent Ni(2), and four equivalent Ni(3) atoms to form distorted face-sharing InPr4Ni8 cuboctahedra. In the sixth In site, In(6) is bonded in a 12-coordinate geometry to one Pr(3), two equivalent Pr(1), two equivalent Pr(2), one Ni(1), one Ni(3), two equivalent Ni(2), two equivalent Ni(4), and one In(3) atom. In the seventh In site, In(7) is bonded in a distorted water-like geometry to two equivalent Pr(2), two equivalent Pr(3), two equivalent Ni(4), two equivalent In(1), and four equivalent In(3) atoms.
Pr4Ni7In8 is beta Plutonium-derived structured and crystallizes in the orthorhombic Cmmm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 2-coordinate geometry to two equivalent Ni(2), four equivalent Ni(1), two equivalent In(4), and four equivalent In(6) atoms. Both Pr(1)-Ni(2) bond lengths are 2.85 Å. All Pr(1)-Ni(1) bond lengths are 3.42 Å. Both Pr(1)-In(4) bond lengths are 3.48 Å. All Pr(1)-In(6) bond lengths are 3.42 Å. In the second Pr site, Pr(2) is bonded in a 13-coordinate geometry to one Ni(4), two equivalent Ni(1), one In(2), one In(7), two equivalent In(1), two equivalent In(6), and four equivalent In(3) atoms. The Pr(2)-Ni(4) bond length is 2.86 Å. Both Pr(2)-Ni(1) bond lengths are 3.15 Å. The Pr(2)-In(2) bond length is 3.34 Å. The Pr(2)-In(7) bond length is 3.50 Å. Both Pr(2)-In(1) bond lengths are 3.35 Å. Both Pr(2)-In(6) bond lengths are 3.33 Å. There are two shorter (3.38 Å) and two longer (3.45 Å) Pr(2)-In(3) bond lengths. In the third Pr site, Pr(3) is bonded in a 18-coordinate geometry to two equivalent Ni(3), four equivalent Ni(2), four equivalent Ni(4), two equivalent In(3), two equivalent In(5), two equivalent In(6), and two equivalent In(7) atoms. Both Pr(3)-Ni(3) bond lengths are 3.12 Å. All Pr(3)-Ni(2) bond lengths are 3.28 Å. All Pr(3)-Ni(4) bond lengths are 3.19 Å. Both Pr(3)-In(3) bond lengths are 3.53 Å. Both Pr(3)-In(5) bond lengths are 3.36 Å. Both Pr(3)-In(6) bond lengths are 3.32 Å. Both Pr(3)-In(7) bond lengths are 3.56 Å. There are four inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 10-coordinate geometry to two equivalent Pr(3), four equivalent Ni(2), two equivalent In(5), and two equivalent In(6) atoms. All Ni(3)-Ni(2) bond lengths are 2.56 Å. Both Ni(3)-In(5) bond lengths are 2.82 Å. Both Ni(3)-In(6) bond lengths are 2.72 Å. In the second Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Pr(2), two equivalent Pr(3), one Ni(2), one In(7), two equivalent In(3), and two equivalent In(6) atoms. The Ni(4)-Ni(2) bond length is 2.40 Å. The Ni(4)-In(7) bond length is 2.62 Å. Both Ni(4)-In(3) bond lengths are 2.66 Å. Both Ni(4)-In(6) bond lengths are 2.91 Å. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Ni(1), one In(1), one In(4), one In(6), and two equivalent In(2) atoms. The Ni(1)-Ni(1) bond length is 2.81 Å. The Ni(1)-In(1) bond length is 2.68 Å. The Ni(1)-In(4) bond length is 2.68 Å. The Ni(1)-In(6) bond length is 2.65 Å. Both Ni(1)-In(2) bond lengths are 2.60 Å. In the fourth Ni site, Ni(2) is bonded in a 10-coordinate geometry to one Pr(1), two equivalent Pr(3), one Ni(2), one Ni(4), two equivalent Ni(3), one In(5), and two equivalent In(6) atoms. The Ni(2)-Ni(2) bond length is 2.61 Å. The Ni(2)-In(5) bond length is 2.48 Å. Both Ni(2)-In(6) bond lengths are 2.66 Å. There are seven inequivalent In sites. In the first In site, In(1) is bonded in a 12-coordinate geometry to four equivalent Pr(2), two equivalent Ni(1), two equivalent In(2), two equivalent In(3), and two equivalent In(7) atoms. Both In(1)-In(2) bond lengths are 3.31 Å. Both In(1)-In(3) bond lengths are 3.25 Å. Both In(1)-In(7) bond lengths are 3.03 Å. In the second In site, In(2) is bonded in a 4-coordinate geometry to two equivalent Pr(2), four equivalent Ni(1), two equivalent In(1), and two equivalent In(4) atoms. Both In(2)-In(4) bond lengths are 3.02 Å. In the third In site, In(3) is bonded in a 12-coordinate geometry to one Pr(3), four equivalent Pr(2), two equivalent Ni(4), one In(1), one In(3), one In(6), and two equivalent In(7) atoms. The In(3)-In(3) bond length is 3.16 Å. The In(3)-In(6) bond length is 3.10 Å. Both In(3)-In(7) bond lengths are 3.19 Å. In the fourth In site, In(4) is bonded to four equivalent Pr(1), four equivalent Ni(1), and four equivalent In(2) atoms to form distorted face-sharing InPr4In4Ni4 cuboctahedra. In the fifth In site, In(5) is bonded to four equivalent Pr(3), four equivalent Ni(2), and four equivalent Ni(3) atoms to form distorted face-sharing InPr4Ni8 cuboctahedra. In the sixth In site, In(6) is bonded in a 12-coordinate geometry to one Pr(3), two equivalent Pr(1), two equivalent Pr(2), one Ni(1), one Ni(3), two equivalent Ni(2), two equivalent Ni(4), and one In(3) atom. In the seventh In site, In(7) is bonded in a distorted water-like geometry to two equivalent Pr(2), two equivalent Pr(3), two equivalent Ni(4), two equivalent In(1), and four equivalent In(3) atoms.