MgHg5 crystallizes in the trigonal R32 space group. Mg(1) is bonded in a 6-coordinate geometry to six equivalent Hg(1) and six equivalent Hg(2) atoms. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Mg(1) and four equivalent Hg(2) atoms. In the second Hg site, Hg(2) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Hg(1) atoms.
MgHg5 crystallizes in the trigonal R32 space group. Mg(1) is bonded in a 6-coordinate geometry to six equivalent Hg(1) and six equivalent Hg(2) atoms. All Mg(1)-Hg(1) bond lengths are 3.08 Å. All Mg(1)-Hg(2) bond lengths are 3.51 Å. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Mg(1) and four equivalent Hg(2) atoms. There are two shorter (3.16 Å) and two longer (3.33 Å) Hg(1)-Hg(2) bond lengths. In the second Hg site, Hg(2) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Hg(1) atoms.