Thallium Uranyl Carbonate, Tl₄UO₂(CO₃)₃

Thallium Uranyl Carbonate, Tl₄UO₂(CO₃)₃, separates as a crystalline precipitate on the addition of thallous nitrate to a solution containing uranium in presence of a carbonate. It is extremely insoluble in water, and the crystals, which are characteristic, may serve for the microchemical detection of uranium.