Thallic iodate

C. F. Rammelsberg24 obtained a pale-brown insoluble thallic periodate, 3Tl203.I207.30H20, by the action of periodic acid on thallic oxide, Tl2Oa. The compound is decomposed by potash lye thallous periodate has not been made. A yellowish-white precipitate is formed when thallous hydroxide is treated with periodic acid, or when sodium dimesoperiodate is added to the soln. of a thallous salt. The precipitate is reddish-yellow when dried, and appears to be a mixture of thallous and thallic iodates. 

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