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
Radium Cruiser Radium Cruiser The Radium Cruiser was a Russel Brothers tugboat operated on the Mackenzie River system for the "Radium Line". She was constructed in Owen Sound, Ontario, in 1939, then disassembled and shipped by rail to Waterways, Alberta. Waterways is a river port, and was then the northern terminus of the North American railway grid. Waterways is on the Clearwater River, not far upstream from where the river empties into Lake Athabasca. The waters of Lake Athabasca flow into Great Slave Lake down the Slave River, and then down the Mackenzie River to the Arctic Ocean. A 16 mile series