MgGa2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 9-coordinate geometry to four equivalent Ga(2) and five equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to five equivalent Mg(1), two equivalent Ga(1), and three equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to four equivalent Mg(1) and three equivalent Ga(1) atoms.
MgGa2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 9-coordinate geometry to four equivalent Ga(2) and five equivalent Ga(1) atoms. There are two shorter (2.88 Å) and two longer (2.95 Å) Mg(1)-Ga(2) bond lengths. There are a spread of Mg(1)-Ga(1) bond distances ranging from 2.91-2.98 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to five equivalent Mg(1), two equivalent Ga(1), and three equivalent Ga(2) atoms. Both Ga(1)-Ga(1) bond lengths are 2.98 Å. There are two shorter (2.80 Å) and one longer (2.96 Å) Ga(1)-Ga(2) bond length. In the second Ga site, Ga(2) is bonded in a 4-coordinate geometry to four equivalent Mg(1) and three equivalent Ga(1) atoms.