Thallium Iodide
Thallium iodide can refer to: * Thallium(I) iodide (thallium monoiodide), TlI * Thallium triiodide Thallium triiodide, more precisely thallium(I) triiodide is a chemical compound of thallium and iodine with empirical formula . Unlike the other thallium trihalides, which contain thallium(III), is actually a thallium(I) salt containing thallium( ..., TlI3 {{Short pages monitor ...
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Thallium(I) Iodide
Thallium(I) iodide is a chemical compound with the formula . It is exists as both a solid and high temperature red polymorph. Thallium(I) iodide is one of several water-insoluble metal iodides, along with AgI, CuI, SnI2, SnI4, PbI2, and HgI2. Synthesis and reactions TlI can be formed in aqueous solution by metathesis of soluble thallium salt with iodide ion. Alternatively, it has been prepared from the elements: : An excess of iodine produces thallium(I) triiodide, . Physical properties The room temperature form of TlI is yellow and has an orthorhombic structure which can be considered to be a distorted NaCl structure. The distorted structure is may be caused by favorable thallium-thallium interactions, the closest Tl-Tl distance is 383 pm. At 175 °C the yellow form transforms to a red CsCl form. This phase transition is accompanied by about two orders of magnitude jump in electrical conductivity. The CsI structure can be stabilized down to room temperature by ...
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