Mg2Sr crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 12-coordinate geometry to six equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1) and two equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), and two equivalent Mg(2) atoms.
Mg2Sr crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 12-coordinate geometry to six equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms. There are four shorter (3.73 Å) and two longer (3.92 Å) Sr(1)-Sr(1) bond lengths. Both Sr(1)-Mg(2) bond lengths are 3.55 Å. There are two shorter (3.54 Å) and two longer (3.96 Å) Sr(1)-Mg(1) bond lengths. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to four equivalent Sr(1) and two equivalent Mg(2) atoms. Both Mg(1)-Mg(2) bond lengths are 3.16 Å. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Mg(1), and two equivalent Mg(2) atoms. Both Mg(2)-Mg(2) bond lengths are 3.29 Å.