Mg2Sr is Cubic Laves structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Sr(1), three equivalent Mg(2), and nine equivalent Mg(1) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded to six equivalent Sr(1) and six equivalent Mg(1) atoms to form a mixture of corner, edge, and face-sharing MgSr6Mg6 cuboctahedra. In the second Mg site, Mg(1) is bonded to six equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms to form a mixture of corner, edge, and face-sharing MgSr6Mg6 cuboctahedra.
Mg2Sr is Cubic Laves structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded in a 16-coordinate geometry to four equivalent Sr(1), three equivalent Mg(2), and nine equivalent Mg(1) atoms. There are three shorter (3.91 Å) and one longer (4.02 Å) Sr(1)-Sr(1) bond length. All Sr(1)-Mg(2) bond lengths are 3.73 Å. There are six shorter (3.76 Å) and three longer (3.83 Å) Sr(1)-Mg(1) bond lengths. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded to six equivalent Sr(1) and six equivalent Mg(1) atoms to form a mixture of corner, edge, and face-sharing MgSr6Mg6 cuboctahedra. All Mg(2)-Mg(1) bond lengths are 3.26 Å. In the second Mg site, Mg(1) is bonded to six equivalent Sr(1), two equivalent Mg(2), and four equivalent Mg(1) atoms to form a mixture of corner, edge, and face-sharing MgSr6Mg6 cuboctahedra. All Mg(1)-Mg(1) bond lengths are 3.18 Å.