MgGa2 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent Ga(2) and four equivalent Ga(1) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and two equivalent Ga(1) atoms.
MgGa2 crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent Ga(2) and four equivalent Ga(1) atoms. Both Mg(1)-Ga(2) bond lengths are 2.90 Å. There are two shorter (3.00 Å) and two longer (3.02 Å) Mg(1)-Ga(1) bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and two equivalent Ga(2) atoms. Both Ga(1)-Ga(2) bond lengths are 2.80 Å. In the second Ga site, Ga(2) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and two equivalent Ga(1) atoms.