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In(Hg) is Tungsten Carbide-like structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Hg is bonded in a 6-coordinate geometry to six equivalent In atoms. All Hg–In bond lengths are 3.13 Å. In is bonded in a 6-coordinate geometry to six equivalent Hg atoms.
HgIn3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hg is bonded in a distorted hexagonal planar geometry to twelve equivalent In atoms. There are six shorter (3.29 Å) and six longer (3.49 Å) Hg–In bond lengths. In is bonded to four equivalent Hg and eight equivalent In atoms to form a mixture of distorted corner, edge, and face-sharing InIn8Hg4 cuboctahedra. There are a spread of In–In bond distances ranging from 3.27–3.50 Å.
Hg3In crystallizes in the orthorhombic C222 space group. The structure is three-dimensional. there are two inequivalent Hg sites. In the first Hg site, Hg is bonded in a 8-coordinate geometry to eight Hg atoms. There are four shorter (3.27 Å) and four longer (3.29 Å) Hg–Hg bond lengths. In the second Hg site, Hg is bonded in a 8-coordinate geometry to six Hg and two equivalent In atoms. All Hg–Hg bond lengths are 3.27 Å. Both Hg–In bond lengths are 3.27 Å. In is bonded in a 8-coordinate geometry to four equivalent Hg and four equivalent In atoms. All In–In bond lengths are 3.27 Å.
Hg3In crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Hg is bonded in a distorted see-saw-like geometry to four equivalent In atoms. There are two shorter (3.36 Å) and two longer (3.39 Å) Hg–In bond lengths. In is bonded to twelve equivalent Hg atoms to form a mixture of face and corner-sharing InHg12 cuboctahedra.
HgIn2In crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two indium molecules and one HgIn2 sheet oriented in the (0, 0, 1) direction. In the HgIn2 sheet, Hg is bonded in a distorted rectangular see-saw-like geometry to four equivalent In atoms. All Hg–In bond lengths are 2.94 Å. In is bonded in a 4-coordinate geometry to two equivalent Hg and two equivalent In atoms. Both In–In bond lengths are 2.90 Å.