Mg6CeFe crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and one Fe(1) atom. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Ce(1), and two equivalent Fe(1) atoms. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and two equivalent Fe(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), four equivalent Mg(1), and two equivalent Ce(1) atoms. Ce(1) is bonded in a 2-coordinate geometry to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), four equivalent Mg(2), and two equivalent Ce(1) atoms.
Mg6CeFe crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and one Fe(1) atom. There is one shorter (2.86 Å) and one longer (2.87 Å) Mg(1)-Mg(1) bond length. Both Mg(1)-Mg(2) bond lengths are 3.07 Å. Both Mg(1)-Mg(3) bond lengths are 3.40 Å. Both Mg(1)-Mg(4) bond lengths are 3.09 Å. There is one shorter (3.40 Å) and one longer (3.43 Å) Mg(1)-Ce(1) bond length. The Mg(1)-Fe(1) bond length is 3.09 Å. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to one Mg(3), one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Ce(1), and two equivalent Fe(1) atoms. The Mg(2)-Mg(3) bond length is 2.99 Å. The Mg(2)-Mg(4) bond length is 3.19 Å. There is one shorter (2.80 Å) and one longer (2.92 Å) Mg(2)-Mg(2) bond length. Both Mg(2)-Ce(1) bond lengths are 3.20 Å. Both Mg(2)-Fe(1) bond lengths are 3.04 Å. In the third Mg site, Mg(3) is bonded in a 2-coordinate geometry to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and two equivalent Fe(1) atoms. Both Mg(3)-Mg(4) bond lengths are 2.94 Å. Both Mg(3)-Fe(1) bond lengths are 3.02 Å. In the fourth Mg site, Mg(4) is bonded in a 10-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), four equivalent Mg(1), and two equivalent Ce(1) atoms. Both Mg(4)-Ce(1) bond lengths are 3.20 Å. Ce(1) is bonded in a 2-coordinate geometry to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(2), and two equivalent Fe(1) atoms. Both Ce(1)-Fe(1) bond lengths are 2.89 Å. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), four equivalent Mg(2), and two equivalent Ce(1) atoms.