Yttrium iodate

Cerous iodates and the iodates of the other rare earths form crystalline salts sparingly soluble in water, but readily soluble in cone, nitric acid, and in this respect differ from the ceric, zirconium, and thorium iodates, which are almost insoluble in nitric acid when an excess of a soluble iodate is present. It may also be noted that cerium alone of all the rare earth elements is oxidized to a higher valence by potassium bromate in nitric acid soln. The iodates of the rare earths are precipitated by adding an alkali iodate to the rare earth salts, and the fact that the rare earth iodates are soluble in nitric acid, and the solubility increases as the electro-positive character of the element increases, while thorium iodate is insoluble in nitric acid, allows the method to be used for the separation of these elements. Trihydrated erbium iodate, Er(I03)3.3H20, and trihydrated yttrium iodate, Yt(I03)3.3H20,... 

Nickel(II) carbonate MCO3 1.42 10-3 Yttrium iodate YdOdj 1.12 10-3 ... 

A sample of the praseodymium group (praseodymium, neodymium, and element 61 most of the cerium, samarium, europium, and yttrium fission products had been removed, cerium by ceric iodate precipitations and the others by potassium carbonate digestions) was absorbed on an Amberlite IR-1 column. The elution curve is shown in Fig. 14.1. The soft P emitter (now known to be 2.62-year see Table 14.2) appeared in the position expected (by... 

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