SrMg6Ce crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(2) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Ce(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Sr(1), four equivalent Mg(1), and four equivalent Mg(2) atoms. Ce(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms.
SrMg6Ce crystallizes in the orthorhombic Amm2 space group. Sr(1) is bonded in a 10-coordinate geometry to two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(2) atoms. Both Sr(1)-Mg(4) bond lengths are 3.44 Å. There are two shorter (3.21 Å) and two longer (3.32 Å) Sr(1)-Mg(1) bond lengths. All Sr(1)-Mg(2) bond lengths are 3.30 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. Both Mg(1)-Mg(2) bond lengths are 3.28 Å. Both Mg(1)-Mg(3) bond lengths are 3.20 Å. Both Mg(1)-Mg(4) bond lengths are 3.30 Å. There is one shorter (3.19 Å) and one longer (3.35 Å) Mg(1)-Ce(1) bond length. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Ce(1) atoms. There is one shorter (3.25 Å) and one longer (3.28 Å) Mg(2)-Mg(3) bond length. There is one shorter (3.02 Å) and one longer (3.51 Å) Mg(2)-Mg(4) bond length. Both Mg(2)-Ce(1) bond lengths are 3.22 Å. In the third Mg site, Mg(3) is bonded in a distorted q6 geometry to four equivalent Mg(1), four equivalent Mg(2), and two equivalent Ce(1) atoms. Both Mg(3)-Ce(1) bond lengths are 3.41 Å. In the fourth Mg site, Mg(4) is bonded in a 8-coordinate geometry to two equivalent Sr(1), four equivalent Mg(1), and four equivalent Mg(2) atoms. Ce(1) is bonded in a 10-coordinate geometry to two equivalent Mg(3), four equivalent Mg(1), and four equivalent Mg(2) atoms.