SrMg3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent Mg(1) and eight equivalent Mg(2) atoms. In the second Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent Mg(1) and eight equivalent Mg(2) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to six Sr(1,1) and eight equivalent Mg(2) atoms. In the second Mg site, Mg(2) is bonded in a distorted body-centered cubic geometry to four Sr(1,1) and four equivalent Mg(1) atoms.
SrMg3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent Mg(1) and eight equivalent Mg(2) atoms. There are two shorter (3.64 Å) and four longer (3.94 Å) Sr(1)-Mg(1) bond lengths. All Sr(1)-Mg(2) bond lengths are 3.33 Å. In the second Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent Mg(1) and eight equivalent Mg(2) atoms. There are two shorter (3.64 Å) and four longer (3.94 Å) Sr(1)-Mg(1) bond lengths. All Sr(1)-Mg(2) bond lengths are 3.33 Å. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to six Sr(1,1) and eight equivalent Mg(2) atoms. All Mg(1)-Mg(2) bond lengths are 3.33 Å. In the second Mg site, Mg(2) is bonded in a distorted body-centered cubic geometry to four Sr(1,1) and four equivalent Mg(1) atoms.