Radium of radium Curie used the residues after extraction of uranium from pitchblende. The uranium had been extracted by dissolution in sulfuric acid leaving radium sulfate, which is similar to barium sulfate but even less soluble in the residues. The residues also contained rather substantial amounts of barium sulfate which thus acted as a carrier for the radium sulfate. The first steps of the radium extraction process involved boiling with sodium hydroxide followed by hydrochloric acid treatment to remove as much as possible of other compounds. The remaining residue was then treated with sodium carbonate to convert the barium sulfate into
Jaduguda uranium mine mines and the smugglers were trying to sell it to Nepal. The market value of the seized uranium was estimated at on the international market. When uranium ore is extracted from the ground, 99.28% of the mined ore is treated as waste as the uranium isotopes used in nuclear power plants mainly is uranium-235 leaving behind the major portion of the ore which constitutes of uranium-236 and uranium-238 as well as some other components. This waste (also referred to as tailings) is then neutralised with lime and carried through pipelines to a tailing pond. This transport is made possible through