Materials Data on In2HgSe4 by Materials Project
HgIn2Se4 crystallizes in the tetragonal I-4 space group. The structure is three-dimensional. Hg2+ is bonded to four equivalent Se2- atoms to form HgSe4 tetrahedra that share corners with eight InSe4 tetrahedra. All Hg–Se bond lengths are 2.73 Å. There are two inequivalent In3+ sites. In the first In3+ site, In3+ is bonded to four equivalent Se2- atoms to form InSe4 tetrahedra that share corners with four equivalent HgSe4 tetrahedra and corners with four equivalent InSe4 tetrahedra. All In–Se bond lengths are 2.65 Å. In the second In3+ site, In3+ is bonded to four equivalent Se2- atoms to form InSe4 tetrahedra that share corners with four equivalent HgSe4 tetrahedra and corners with four equivalent InSe4 tetrahedra. All In–Se bond lengths are 2.64 Å. Se2- is bonded in a trigonal non-coplanar geometry to one Hg2+ and two In3+ atoms.