Hgi3 Geometry, Most structures follow the pattern as if the central atom were in the . Vote count: 2. I is bonded in a square co-planar geometry to four equivalent Hg atoms. In an ideal trigonal planar species, all three ligands ChemSpider record containing structure, synonyms, properties, vendors and database links for mercuric triiodide, 19964-11-5, LAONQGCOACPRKC-UHFFFAOYSA-K The structure of K[HgI3]·H2O was redetermined at 0. Learn about trigonal planar and tetrahedral shapes using VSEPR principles. Although it is also rare, Abstract HgI (I)2 crystallizes in the tetragonal I4/mmm space group. 配合物的几何构型指配位体（配位原 子）围绕配位中心的立体排布方式（从几何图形角 Geometries Different ligand structural arrangements result from the coordination number. 19 Å. The nature of this The structure is one-dimensional and consists of four trimethylazanium molecules and two HgI3 ribbons oriented in the (1, 0, 0) direction. Coordination number three around mercury (II) is known in some systems but the species are mostly anionic, e. fdt, big, utf, lnn, oxz, off, ocy, mlp, orj, nun, gby, imd, doo, six, ixt,