PrNiIn2 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Ni(1), two equivalent Ni(2), one In(3), two equivalent In(2), two equivalent In(4), and four equivalent In(6) atoms. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to one Ni(3), two equivalent Ni(1), one In(5), one In(6), two equivalent In(1), two equivalent In(3), two equivalent In(4), and three equivalent In(2) atoms. In the third Pr site, Pr(3) is bonded in a 13-coordinate geometry to one Ni(3), four equivalent Ni(2), two equivalent In(3), two equivalent In(5), and four equivalent In(4) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), one In(4), one In(5), one In(6), and two equivalent In(3) atoms. In the second Ni site, Ni(3) is bonded in a 9-coordinate geometry to one Pr(3), two equivalent Pr(2), two equivalent In(1), and four equivalent In(4) atoms. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Pr(1), two equivalent Pr(2), one In(3), two equivalent In(6), and three equivalent In(2) atoms. There are six inequivalent In sites. In the first In site, In(5) is bonded in a 2-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), two equivalent Ni(2), two equivalent In(1), and four equivalent In(3) atoms. In the second In site, In(6) is bonded in a 12-coordinate geometry to one Pr(2), four equivalent Pr(1), one Ni(2), two equivalent Ni(1), one In(2), one In(6), and two equivalent In(3) atoms. In the third In site, In(1) is bonded to four equivalent Pr(2), two equivalent Ni(3), two equivalent In(3), two equivalent In(4), and two equivalent In(5) atoms to form distorted face-sharing InPr4In6Ni2 cuboctahedra. In the fourth In site, In(2) is bonded in a 12-coordinate geometry to two equivalent Pr(1), three equivalent Pr(2), three equivalent Ni(1), one In(4), one In(6), and two equivalent In(2) atoms. In the fifth In site, In(3) is bonded in a 12-coordinate geometry to one Pr(1), one Pr(3), two equivalent Pr(2), one Ni(1), two equivalent Ni(2), one In(1), two equivalent In(5), and two equivalent In(6) atoms. In the sixth In site, In(4) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Pr(3), one Ni(2), two equivalent Ni(3), one In(1), one In(2), and one In(4) atom.
PrNiIn2 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Ni(1), two equivalent Ni(2), one In(3), two equivalent In(2), two equivalent In(4), and four equivalent In(6) atoms. The Pr(1)-Ni(1) bond length is 3.01 Å. Both Pr(1)-Ni(2) bond lengths are 3.14 Å. The Pr(1)-In(3) bond length is 3.30 Å. Both Pr(1)-In(2) bond lengths are 3.54 Å. Both Pr(1)-In(4) bond lengths are 3.34 Å. There are two shorter (3.37 Å) and two longer (3.50 Å) Pr(1)-In(6) bond lengths. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to one Ni(3), two equivalent Ni(1), one In(5), one In(6), two equivalent In(1), two equivalent In(3), two equivalent In(4), and three equivalent In(2) atoms. The Pr(2)-Ni(3) bond length is 3.14 Å. Both Pr(2)-Ni(1) bond lengths are 3.35 Å. The Pr(2)-In(5) bond length is 3.47 Å. The Pr(2)-In(6) bond length is 3.53 Å. Both Pr(2)-In(1) bond lengths are 3.46 Å. Both Pr(2)-In(3) bond lengths are 3.28 Å. Both Pr(2)-In(4) bond lengths are 3.50 Å. There are two shorter (3.33 Å) and one longer (3.61 Å) Pr(2)-In(2) bond length. In the third Pr site, Pr(3) is bonded in a 13-coordinate geometry to one Ni(3), four equivalent Ni(2), two equivalent In(3), two equivalent In(5), and four equivalent In(4) atoms. The Pr(3)-Ni(3) bond length is 2.83 Å. All Pr(3)-Ni(2) bond lengths are 3.12 Å. Both Pr(3)-In(3) bond lengths are 3.36 Å. Both Pr(3)-In(5) bond lengths are 3.39 Å. All Pr(3)-In(4) bond lengths are 3.39 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), one In(4), one In(5), one In(6), and two equivalent In(3) atoms. The Ni(2)-In(4) bond length is 2.84 Å. The Ni(2)-In(5) bond length is 2.67 Å. The Ni(2)-In(6) bond length is 2.70 Å. Both Ni(2)-In(3) bond lengths are 2.73 Å. In the second Ni site, Ni(3) is bonded in a 9-coordinate geometry to one Pr(3), two equivalent Pr(2), two equivalent In(1), and four equivalent In(4) atoms. Both Ni(3)-In(1) bond lengths are 2.80 Å. All Ni(3)-In(4) bond lengths are 2.89 Å. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Pr(1), two equivalent Pr(2), one In(3), two equivalent In(6), and three equivalent In(2) atoms. The Ni(1)-In(3) bond length is 2.66 Å. Both Ni(1)-In(6) bond lengths are 2.76 Å. There is one shorter (2.68 Å) and two longer (2.77 Å) Ni(1)-In(2) bond lengths. There are six inequivalent In sites. In the first In site, In(5) is bonded in a 2-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), two equivalent Ni(2), two equivalent In(1), and four equivalent In(3) atoms. Both In(5)-In(1) bond lengths are 3.10 Å. All In(5)-In(3) bond lengths are 3.23 Å. In the second In site, In(6) is bonded in a 12-coordinate geometry to one Pr(2), four equivalent Pr(1), one Ni(2), two equivalent Ni(1), one In(2), one In(6), and two equivalent In(3) atoms. The In(6)-In(2) bond length is 2.99 Å. The In(6)-In(6) bond length is 3.14 Å. Both In(6)-In(3) bond lengths are 3.18 Å. In the third In site, In(1) is bonded to four equivalent Pr(2), two equivalent Ni(3), two equivalent In(3), two equivalent In(4), and two equivalent In(5) atoms to form distorted face-sharing InPr4In6Ni2 cuboctahedra. Both In(1)-In(3) bond lengths are 3.31 Å. Both In(1)-In(4) bond lengths are 3.05 Å. In the fourth In site, In(2) is bonded in a 12-coordinate geometry to two equivalent Pr(1), three equivalent Pr(2), three equivalent Ni(1), one In(4), one In(6), and two equivalent In(2) atoms. The In(2)-In(4) bond length is 3.34 Å. Both In(2)-In(2) bond lengths are 3.23 Å. In the fifth In site, In(3) is bonded in a 12-coordinate geometry to one Pr(1), one Pr(3), two equivalent Pr(2), one Ni(1), two equivalent Ni(2), one In(1), two equivalent In(5), and two equivalent In(6) atoms. In the sixth In site, In(4) is bonded in a 12-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), two equivalent Pr(3), one Ni(2), two equivalent Ni(3), one In(1), one In(2), and one In(4) atom. The In(4)-In(4) bond length is 3.29 Å.