CeRu2Mg5 crystallizes in the tetragonal P4_2/ncm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded in a 3-coordinate geometry to three equivalent Ru(1) atoms. In the second Mg site, Mg(1) is bonded in a linear geometry to two equivalent Ru(1) atoms. Ce(1) is bonded in a bent 150 degrees geometry to two equivalent Ru(1) atoms. Ru(1) is bonded in a 8-coordinate geometry to one Mg(1), six equivalent Mg(2), and one Ce(1) atom.
CeRu2Mg5 crystallizes in the tetragonal P4_2/ncm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded in a 3-coordinate geometry to three equivalent Ru(1) atoms. There are a spread of Mg(2)-Ru(1) bond distances ranging from 2.80-2.83 Å. In the second Mg site, Mg(1) is bonded in a linear geometry to two equivalent Ru(1) atoms. Both Mg(1)-Ru(1) bond lengths are 2.74 Å. Ce(1) is bonded in a bent 150 degrees geometry to two equivalent Ru(1) atoms. Both Ce(1)-Ru(1) bond lengths are 2.34 Å. Ru(1) is bonded in a 8-coordinate geometry to one Mg(1), six equivalent Mg(2), and one Ce(1) atom.