Materials Data on Mg3Hg by Materials Project

Abstract

Mg3Hg crystallizes in the trigonal R32 space group. The structure is three-dimensional. there are five inequivalent Mg sites. In the first Mg site, Mg is bonded in a 3-coordinate geometry to three Hg atoms. There are a spread of Mg–Hg bond distances ranging from 2.83–3.12 Å. In the second Mg site, Mg is bonded in a distorted trigonal non-coplanar geometry to three equivalent Hg atoms. All Mg–Hg bond lengths are 2.95 Å. In the third Mg site, Mg is bonded in a 3-coordinate geometry to three Hg atoms. There are a spread of Mg–Hg bond distances ranging from 2.90–3.09 Å. In the fourth Mg site, Mg is bonded in a 3-coordinate geometry to three equivalent Hg atoms. All Mg–Hg bond lengths are 3.06 Å. In the fifth Mg site, Mg is bonded in a trigonal planar geometry to three equivalent Hg atoms. All Mg–Hg bond lengths are 2.83 Å. There are two inequivalent Hg sites. In the first Hg site, Hg is bonded in a distorted q6 geometry to ten Mg atoms. In the second Hg site, Hg is bonded in a 8-coordinate geometry to eight Mg atoms.