Mg5Ga2 crystallizes in the monoclinic C2/c space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. In the second Mg site, Mg(2) is bonded to four equivalent Ga(1) atoms to form distorted edge-sharing MgGa4 tetrahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. In the fourth Mg site, Mg(3) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. Ga(1) is bonded in a 10-coordinate geometry to two equivalent Mg(2); four equivalent Mg(1); and four Mg(3,3) atoms.
Mg5Ga2 crystallizes in the monoclinic C2/c space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. There are a spread of Mg(1)-Ga(1) bond distances ranging from 2.76-3.09 Å. In the second Mg site, Mg(2) is bonded to four equivalent Ga(1) atoms to form distorted edge-sharing MgGa4 tetrahedra. All Mg(2)-Ga(1) bond lengths are 2.89 Å. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. There are two shorter (2.80 Å) and two longer (2.96 Å) Mg(3)-Ga(1) bond lengths. In the fourth Mg site, Mg(3) is bonded in a 4-coordinate geometry to four equivalent Ga(1) atoms. There are two shorter (2.79 Å) and two longer (2.97 Å) Mg(3)-Ga(1) bond lengths. Ga(1) is bonded in a 10-coordinate geometry to two equivalent Mg(2); four equivalent Mg(1); and four Mg(3,3) atoms.