Thallium triiodide

is formulated , and has a similar structure to ammonium triiodide|, caesium triiodide| and Rubidium triiodide|. The triiodide ion in is nearly linear but is asymmetric with one iodine–iodine bond longer than the other. For comparison the dimensions of the triiodide, Ia–Ib–Ic, ions in the different compounds are shown below: can be prepared by the evaporation of stoichiometric quantities of thallium(I) iodide (TlI) and iodine in concentrated aqueous hydriodic acid, or by reacting TlI with iodine in ethanol. == References==