Pr4NiMg crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent Pr(1), three equivalent Pr(2), and three equivalent Pr(3) atoms to form a mixture of face and corner-sharing MgPr9Mg3 cuboctahedra. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a bent 150 degrees geometry to two equivalent Mg(1), four equivalent Pr(2), and two equivalent Ni(1) atoms. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to two equivalent Mg(1), two equivalent Pr(3), four equivalent Pr(1), four equivalent Pr(2), and two equivalent Ni(1) atoms. In the third Pr site, Pr(3) is bonded in a 3-coordinate geometry to three equivalent Mg(1), three equivalent Pr(2), and three equivalent Ni(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Pr(3) atoms.
Pr4NiMg crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent Pr(1), three equivalent Pr(2), and three equivalent Pr(3) atoms to form a mixture of face and corner-sharing MgPr9Mg3 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.14 Å. All Mg(1)-Pr(1) bond lengths are 3.63 Å. All Mg(1)-Pr(2) bond lengths are 3.43 Å. All Mg(1)-Pr(3) bond lengths are 3.63 Å. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a bent 150 degrees geometry to two equivalent Mg(1), four equivalent Pr(2), and two equivalent Ni(1) atoms. All Pr(1)-Pr(2) bond lengths are 3.74 Å. Both Pr(1)-Ni(1) bond lengths are 2.92 Å. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to two equivalent Mg(1), two equivalent Pr(3), four equivalent Pr(1), four equivalent Pr(2), and two equivalent Ni(1) atoms. Both Pr(2)-Pr(3) bond lengths are 3.62 Å. All Pr(2)-Pr(2) bond lengths are 3.73 Å. Both Pr(2)-Ni(1) bond lengths are 3.61 Å. In the third Pr site, Pr(3) is bonded in a 3-coordinate geometry to three equivalent Mg(1), three equivalent Pr(2), and three equivalent Ni(1) atoms. All Pr(3)-Ni(1) bond lengths are 2.88 Å. Ni(1) is bonded in a 6-coordinate geometry to three equivalent Pr(1), three equivalent Pr(2), and three equivalent Pr(3) atoms.