Mg3Hg is Sodium arsenide structured and 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 1-coordinate geometry to four equivalent Hg(1) atoms. In the second Mg site, Mg(2) is bonded in a trigonal planar geometry to three equivalent Hg(1) atoms. Hg(1) is bonded in a 11-coordinate geometry to three equivalent Mg(2) and eight equivalent Mg(1) atoms.
Mg3Hg is Sodium arsenide structured and 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 1-coordinate geometry to four equivalent Hg(1) atoms. There is one shorter (2.82 Å) and three longer (3.15 Å) Mg(1)-Hg(1) bond lengths. In the second Mg site, Mg(2) is bonded in a trigonal planar geometry to three equivalent Hg(1) atoms. All Mg(2)-Hg(1) bond lengths are 2.79 Å. Hg(1) is bonded in a 11-coordinate geometry to three equivalent Mg(2) and eight equivalent Mg(1) atoms.