Materials Data on Ce4MgRh by Materials Project

Abstract

MgCe4Rh crystallizes in the cubic F-43m space group. The structure is three-dimensional. Mg is bonded to three equivalent Mg and nine Ce atoms to form a mixture of face and corner-sharing MgCe9Mg3 cuboctahedra. All Mg–Mg bond lengths are 3.15 Å. There are a spread of Mg–Ce bond distances ranging from 3.32–3.53 Å. There are three inequivalent Ce sites. In the first Ce site, Ce is bonded in a 3-coordinate geometry to three equivalent Mg and three equivalent Rh atoms. All Ce–Rh bond lengths are 2.87 Å. In the second Ce site, Ce is bonded in a bent 150 degrees geometry to two equivalent Mg and two equivalent Rh atoms. Both Ce–Rh bond lengths are 2.85 Å. In the third Ce site, Ce is bonded in a 4-coordinate geometry to two equivalent Mg and two equivalent Rh atoms. Both Ce–Rh bond lengths are 3.53 Å. Rh is bonded in a 6-coordinate geometry to nine Ce atoms.