Mg2Sr is Magnesium tetraboride-like structured and crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 7-coordinate geometry to one Sr(2), two equivalent Sr(1), two equivalent Mg(2), and two equivalent Mg(3) atoms. In the second Mg site, Mg(2) is bonded in a 8-coordinate geometry to two equivalent Sr(2), three equivalent Sr(1), one Mg(4), and two equivalent Mg(1) atoms. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to one Sr(1), three equivalent Sr(2), two equivalent Mg(1), and two equivalent Mg(4) atoms. In the fourth Mg site, Mg(4) is bonded in a 7-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mg(2), and two equivalent Mg(3) atoms.
Mg2Sr is Magnesium tetraboride-like structured and crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. The Sr(1)-Mg(3) bond length is 3.87 Å. Both Sr(1)-Mg(1) bond lengths are 3.67 Å. Both Sr(1)-Mg(4) bond lengths are 3.70 Å. There are two shorter (3.52 Å) and one longer (3.60 Å) Sr(1)-Mg(2) bond length. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. The Sr(2)-Mg(1) bond length is 3.41 Å. Both Sr(2)-Mg(2) bond lengths are 3.45 Å. Both Sr(2)-Mg(4) bond lengths are 3.64 Å. There are two shorter (3.67 Å) and one longer (3.92 Å) Sr(2)-Mg(3) bond length. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 7-coordinate geometry to one Sr(2), two equivalent Sr(1), two equivalent Mg(2), and two equivalent Mg(3) atoms. Both Mg(1)-Mg(2) bond lengths are 3.05 Å. Both Mg(1)-Mg(3) bond lengths are 3.25 Å. In the second Mg site, Mg(2) is bonded in a 8-coordinate geometry to two equivalent Sr(2), three equivalent Sr(1), one Mg(4), and two equivalent Mg(1) atoms. The Mg(2)-Mg(4) bond length is 2.99 Å. In the third Mg site, Mg(3) is bonded in a 8-coordinate geometry to one Sr(1), three equivalent Sr(2), two equivalent Mg(1), and two equivalent Mg(4) atoms. Both Mg(3)-Mg(4) bond lengths are 3.08 Å. In the fourth Mg site, Mg(4) is bonded in a 7-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mg(2), and two equivalent Mg(3) atoms.