MgY4Rh crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent Y(1), three equivalent Y(2), and three equivalent Y(3) atoms to form a mixture of corner and face-sharing MgY9Mg3 cuboctahedra. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 3-coordinate geometry to three equivalent Mg(1), three equivalent Y(3), and three equivalent Rh(1) atoms. In the second Y site, Y(2) is bonded in a bent 150 degrees geometry to two equivalent Mg(1), four equivalent Y(3), and two equivalent Rh(1) atoms. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to two equivalent Mg(1), two equivalent Y(1), four equivalent Y(2), four equivalent Y(3), and two equivalent Rh(1) atoms. Rh(1) is bonded in a 6-coordinate geometry to three equivalent Y(1), three equivalent Y(2), and three equivalent Y(3) atoms.
MgY4Rh crystallizes in the cubic F-43m space group. Mg(1) is bonded to three equivalent Mg(1), three equivalent Y(1), three equivalent Y(2), and three equivalent Y(3) atoms to form a mixture of corner and face-sharing MgY9Mg3 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.08 Å. All Mg(1)-Y(1) bond lengths are 3.53 Å. All Mg(1)-Y(2) bond lengths are 3.57 Å. All Mg(1)-Y(3) bond lengths are 3.34 Å. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 3-coordinate geometry to three equivalent Mg(1), three equivalent Y(3), and three equivalent Rh(1) atoms. All Y(1)-Y(3) bond lengths are 3.54 Å. All Y(1)-Rh(1) bond lengths are 2.83 Å. In the second Y site, Y(2) is bonded in a bent 150 degrees geometry to two equivalent Mg(1), four equivalent Y(3), and two equivalent Rh(1) atoms. All Y(2)-Y(3) bond lengths are 3.66 Å. Both Y(2)-Rh(1) bond lengths are 2.83 Å. In the third Y site, Y(3) is bonded in a 14-coordinate geometry to two equivalent Mg(1), two equivalent Y(1), four equivalent Y(2), four equivalent Y(3), and two equivalent Rh(1) atoms. All Y(3)-Y(3) bond lengths are 3.63 Å. Both Y(3)-Rh(1) bond lengths are 3.54 Å. Rh(1) is bonded in a 6-coordinate geometry to three equivalent Y(1), three equivalent Y(2), and three equivalent Y(3) atoms.