Materials Data on Pr4MgRh by Materials Project
MgPr4Rh crystallizes in the cubic F-43m space group. The structure is three-dimensional. Mg is bonded to three equivalent Mg and nine Pr atoms to form a mixture of corner and face-sharing MgPr9Mg3 cuboctahedra. All Mg–Mg bond lengths are 3.21 Å. There are a spread of Mg–Pr bond distances ranging from 3.45–3.68 Å. There are three inequivalent Pr sites. In the first Pr site, Pr is bonded in a 3-coordinate geometry to three equivalent Mg and three equivalent Rh atoms. All Pr–Rh bond lengths are 2.93 Å. In the second Pr site, Pr is bonded in a bent 150 degrees geometry to two equivalent Mg and two equivalent Rh atoms. Both Pr–Rh bond lengths are 2.94 Å. In the third Pr site, Pr is bonded in a 4-coordinate geometry to two equivalent Mg and two equivalent Rh atoms. Both Pr–Rh bond lengths are 3.65 Å. Rh is bonded in a 6-coordinate geometry to nine Pr atoms.