Abstract

telluric acid have been reported in the literature. Probably the most widely used preparation is that of Mathers and co-workers, which is based on the action of potassium permanganate in an acid medium'6'. This method gives a very good yield of the crude product, but the impurities which are inherent in the preparation must be eliminated by repeated recrystallization from concentrated nitric acid solution. The method of Meyer and Franke'7' of oxidizing the free element with chloric acid, has given yields of ninety to ninety five percent. However, again the reaction products lead to a high concentration of impurities which must be eliminated.

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