Tellurium iodine cations

In the anion electrochemical series, sulfur, being the less noble element compared to its heavier congeners, occupies an intermediate position between iodine and selenium [(+)F, Cl, Br, I, S, Se, Te(-)]. Selenium, regarded as a metalloid, is a relatively noble element. Tellurium is rather an amphoteric element it can enter into solution in the form of both cations and anions. Regarded as a metal, i.e., with respect to its cations, tellurium occupies a position between copper and mercury. Regarded as a metalloid, i.e., with respect to its anions, it is located on the extreme right of the above series. 

Solid 002(0211302)2 (natural uranium) was Irradiated with thermal neutrons for 10 min (flux not given) and the target was dissolved In concentrated hydrochloric acid. The solution was boiled for several minutes and was then made. 2-3 molar In the acid. A copper foil was introduced Into the solution and the fission product tellurium plated out on the foil. The coated foil was dissolved In 1 M nitric acid and passed through a cation exchange resin column (resin not designated) to remove the copper. The eluate was made basic with ammonia water. Iodide carrier added, and permitted to grow In for 70 m1n. The Iodide was oxidized to the free element and a number of I2 - I redox cycles were carried out. The Iodine was finally precipitated as the silver salt. 

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