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SrHg2 is hexagonal omega structure-like structured and crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Sr is bonded to twelve equivalent Hg atoms to form a mixture of edge and face-sharing SrHg12 cuboctahedra. All Sr–Hg bond lengths are 3.57 Å. Hg is bonded in a 9-coordinate geometry to six equivalent Sr and three equivalent Hg atoms. All Hg–Hg bond lengths are 2.94 Å.
Sr3Hg2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded in a square co-planar geometry to four equivalent Hg atoms. All Sr–Hg bond lengths are 3.49 Å. In the second Sr site, Sr is bonded to six equivalent Hg atoms to form a mixture of distorted face, edge, and corner-sharing SrHg6 pentagonal pyramids. There are two shorter (3.46 Å) and four longer (3.53 Å) Sr–Hg bond lengths. Hg is bonded in a 8-coordinate geometry to eight Sr atoms.
SrHg is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr is bonded in a body-centered cubic geometry to eight equivalent Hg atoms. All Sr–Hg bond lengths are 3.49 Å. Hg is bonded in a body-centered cubic geometry to eight equivalent Sr atoms.
SrHg2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Sr is bonded in a 12-coordinate geometry to twelve equivalent Hg atoms. There are a spread of Sr–Hg bond distances ranging from 3.48–3.66 Å. Hg is bonded in a 10-coordinate geometry to six equivalent Sr and four equivalent Hg atoms. There are a spread of Hg–Hg bond distances ranging from 2.97–3.25 Å.
SrHg3 is beta Cu3Ti structured and crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. Sr is bonded to twelve Hg atoms to form a mixture of face, edge, and corner-sharing SrHg12 cuboctahedra. There are a spread of Sr–Hg bond distances ranging from 3.38–3.53 Å. There are two inequivalent Hg sites. In the first Hg site, Hg is bonded in a 4-coordinate geometry to four equivalent Sr atoms. In the second Hg site, Hg is bonded in a 4-coordinate geometry to four equivalent Sr atoms.