In 1902 on the 20th of April the Curie couple Marie and Pierre successfully refined radium chloride. Radium chloride (RaCl2) is a chemical compound of radium and chlorine, and the first radium compound isolated in a pure state. The main usage of radium chloride is to separate radium from barium.
Marie Curie was a notable physicist and chemist; she won both the Nobel Prize in Physics along with Pierre Curie for their joint research on the radiation phenomena, and the Nobel Prize in Chemistry in 1911 for the discovery of the elements radium and polonium. She was born in Warsaw in 1867 and married Pierre in 1895, they worked together and published numerous papers on their findings throughout their time together. Marie Curie did sadly die in France in 1934 due to aplastic anemia, this was due to her extensive exposure to radiation. She was reported to have carried round test tubes and radioactive isotopes in her pocket aswell as lying in her desks, she never made the connection of radiation to her decaying health however. Her work is still remembered to this day though and this was one of her early key discoveries in her successful scientific career.