Mg2Sb crystallizes in the orthorhombic Immm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to four equivalent Sb(1) atoms. In the second Mg site, Mg(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Sb(1) atoms. Sb(1) is bonded to four equivalent Mg(1) and four equivalent Mg(2) atoms to form a mixture of distorted corner, edge, and face-sharing SbMg8 hexagonal bipyramids.
Mg2Sb crystallizes in the orthorhombic Immm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to four equivalent Sb(1) atoms. All Mg(1)-Sb(1) bond lengths are 3.11 Å. In the second Mg site, Mg(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Sb(1) atoms. There are two shorter (2.97 Å) and two longer (3.00 Å) Mg(2)-Sb(1) bond lengths. Sb(1) is bonded to four equivalent Mg(1) and four equivalent Mg(2) atoms to form a mixture of distorted corner, edge, and face-sharing SbMg8 hexagonal bipyramids.