Mg2Sn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Sn(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Sn(1) atoms to form a mixture of face and corner-sharing MgMg6Sn5 trigonal bipyramids. Sn(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms.
Mg2Sn crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Sn(1) atoms. Both Mg(1)-Mg(1) bond lengths are 3.14 Å. All Mg(1)-Mg(2) bond lengths are 3.32 Å. All Mg(1)-Sn(1) bond lengths are 3.32 Å. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Sn(1) atoms to form a mixture of face and corner-sharing MgMg6Sn5 trigonal bipyramids. There are three shorter (2.92 Å) and two longer (3.14 Å) Mg(2)-Sn(1) bond lengths. Sn(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms.