Materials Data on Ag2Hg by Materials Project

Abstract

Ag2Hg crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Ag is bonded to nine equivalent Ag and three equivalent Hg atoms to form AgAg9Hg3 cuboctahedra that share corners with three equivalent HgAg6Hg6 cuboctahedra, corners with nine equivalent AgAg9Hg3 cuboctahedra, edges with nine equivalent HgAg6Hg6 cuboctahedra, edges with fifteen equivalent AgAg9Hg3 cuboctahedra, faces with six equivalent HgAg6Hg6 cuboctahedra, and faces with twelve equivalent AgAg9Hg3 cuboctahedra. There are three shorter (2.90 Å) and six longer (3.09 Å) Ag–Ag bond lengths. All Ag–Hg bond lengths are 3.06 Å. Hg is bonded to six equivalent Ag and six equivalent Hg atoms to form HgAg6Hg6 cuboctahedra that share corners with six equivalent AgAg9Hg3 cuboctahedra, corners with six equivalent HgAg6Hg6 cuboctahedra, edges with six equivalent HgAg6Hg6 cuboctahedra, edges with eighteen equivalent AgAg9Hg3 cuboctahedra, faces with six equivalent HgAg6Hg6 cuboctahedra, and faces with twelve equivalent AgAg9Hg3 cuboctahedra. All Hg–Hg bond lengths are 3.09 Å.