SrMg crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 3-coordinate geometry to three equivalent Sr(2) and three equivalent Mg(2) atoms. In the second Sr site, Sr(2) is bonded to six equivalent Sr(1) and six equivalent Sr(2) atoms to form a mixture of corner, face, and edge-sharing SrSr12 cuboctahedra. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(2) atoms to form distorted edge-sharing MgMg6 pentagonal pyramids. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Mg(1) atoms.
SrMg crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 3-coordinate geometry to three equivalent Sr(2) and three equivalent Mg(2) atoms. All Sr(1)-Sr(2) bond lengths are 4.30 Å. All Sr(1)-Mg(2) bond lengths are 3.59 Å. In the second Sr site, Sr(2) is bonded to six equivalent Sr(1) and six equivalent Sr(2) atoms to form a mixture of corner, face, and edge-sharing SrSr12 cuboctahedra. All Sr(2)-Sr(2) bond lengths are 4.25 Å. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to six equivalent Mg(2) atoms to form distorted edge-sharing MgMg6 pentagonal pyramids. All Mg(1)-Mg(2) bond lengths are 3.02 Å. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1) and three equivalent Mg(1) atoms.