BiMg2 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted water-like geometry to two equivalent Bi(1) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent Bi(2) atoms. In the third Mg site, Mg(3) is bonded in a 6-coordinate geometry to two equivalent Bi(2) and four equivalent Bi(1) atoms. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(2) atoms.
BiMg2 crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted water-like geometry to two equivalent Bi(1) atoms. Both Mg(1)-Bi(1) bond lengths are 3.19 Å. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to four equivalent Bi(2) atoms. All Mg(2)-Bi(2) bond lengths are 3.24 Å. In the third Mg site, Mg(3) is bonded in a 6-coordinate geometry to two equivalent Bi(2) and four equivalent Bi(1) atoms. Both Mg(3)-Bi(2) bond lengths are 3.39 Å. All Mg(3)-Bi(1) bond lengths are 3.38 Å. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. Both Mg(4)-Bi(1) bond lengths are 3.15 Å. Both Mg(4)-Bi(2) bond lengths are 3.16 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Mg(4), and four equivalent Mg(3) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to two equivalent Mg(3), two equivalent Mg(4), and four equivalent Mg(2) atoms.