Mg5In2 crystallizes in the monoclinic C2/m space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. In the third Mg site, Mg(3) is bonded to two equivalent In(1) and two equivalent In(2) atoms to form distorted edge-sharing MgIn4 cuboctahedra. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(4) atoms. In the second In site, In(2) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(4) atoms.
Mg5In2 crystallizes in the monoclinic C2/m space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. There is one shorter (2.94 Å) and one longer (2.99 Å) Mg(1)-In(1) bond length. Both Mg(1)-In(2) bond lengths are 3.19 Å. In the second Mg site, Mg(2) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. Both Mg(2)-In(1) bond lengths are 3.19 Å. There is one shorter (2.93 Å) and one longer (2.99 Å) Mg(2)-In(2) bond length. In the third Mg site, Mg(3) is bonded to two equivalent In(1) and two equivalent In(2) atoms to form distorted edge-sharing MgIn4 cuboctahedra. Both Mg(3)-In(1) bond lengths are 3.03 Å. Both Mg(3)-In(2) bond lengths are 3.04 Å. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent In(2) atoms. There is one shorter (2.94 Å) and one longer (3.08 Å) Mg(4)-In(1) bond length. There is one shorter (2.94 Å) and one longer (3.08 Å) Mg(4)-In(2) bond length. There are two inequivalent In sites. In the first In site, In(1) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(4) atoms. In the second In site, In(2) is bonded in a distorted q6 geometry to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), and four equivalent Mg(4) atoms.