BiMg2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 5-coordinate geometry to five equivalent Bi(1) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent Bi(1) atoms. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Mg(2) and five equivalent Mg(1) atoms.
BiMg2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 5-coordinate geometry to five equivalent Bi(1) atoms. There are a spread of Mg(1)-Bi(1) bond distances ranging from 3.17-3.38 Å. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent Bi(1) atoms. There are two shorter (3.28 Å) and two longer (3.30 Å) Mg(2)-Bi(1) bond lengths. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Mg(2) and five equivalent Mg(1) atoms.