. . "Marguerite Perey"@en . "1975-05-13Z"^^ . "1909-10-19Z"^^ . "Marguerite Catherine Perey (19 October 1909 \u2013 13 May 1975) was a French physicist. In 1939, Perey discovered the element francium by purifying samples of lanthanum that contained actinium. She was a student of Marie Curie. In 1962, she was the first woman to be elected to the French Acad\u00E9mie des Sciences, an honor denied to her mentor Curie. Perey died of cancer in 1975."@en . . . . . . "1975Z"^^ . "Perey, Marguerite Catherine"@en . . "French physicist" . "1909Z"^^ .