Curie Institute, Paris

Following presentation at Density Functional International Conference, Curie Institute, Paris 1995... 

Robert Martin Emeritus Professor Formerly Curie Institute Paris, Franee... 

Francium (Fr, [Rn] . 1), name and symbol, after France, the country where it was prepared (Curie Institute in Paris). Discovered (1939) by Marguerite Perey. Very rare in nature, artificially prepared, highly radioactive. 

Francium - the atomic number is 87 and the chemical symbol is Fr. The name derives from the country France , where the French physicist Marguerite Percy from the Curie Institute in Paris, France discovered it in 1939 in the alpha particle decay of actinium, Ac => He => Fr, which was known as actinium-K and has a half-life of 22 minutes. An earlier claim of discovery in 1930 with the element name Virginium was determined to be incorrect. A similar claim for discovery of the element with atomic number 87 and named moldavium was also determined to be incorrect. The longest half-life associated with this unstable element is 22 minute Fr. 

ORIGIN OF NAME In 1939 Marguerite Perey (1909-1975), a French physicist who worked for the Curie institute in Paris, named the newly discovered element after her country—France. 

Less than a year after her husband s death, Mme. Curie accepted a professorship at the University of Paris. With the able assistance of Professor Andre Debierne, who took charge of the laboratory and taught for many years an ever-increasing number of students from all parts of the world, she directed the instruction and research in radioactivity (86). When the university acquired new land, it laid out a street called the Rue Pierre Curie and built a laboratory for her. The Curie Institute and the Pasteur Institute work in close harmony, and Mme. Curie spent much of her time on researches dealing with the therapeutic properties of radium and radon (69). During World War I she had complete charge of the radiological service in French military hospitals. 

The actual discovery was made by Mile. Marguerite Perey at the Curie Institute in Paris. In 1939 she purified an actinium preparation by removing all the known decay products of this element. In her preparation she observed a rapid rise in beta activity which could not be due to any known substance. She was able to show that, while most of the actinium formed radioactinium, an isotope of thorium, by beta emission, 1.2 0.1 per cent of the disintegration of actinium occurred by alpha emission and gave rise to a new element, which she provisionally called actinium K, symbol AcK (35, 36). This decayed rapidly by beta emission to produce AcX, an isotope of radium, which was also formed by alpha emission from radioactinium. Thus AcK, with its short half-life, had been missed previously because its disintegration gave the same product as that from the more plentiful radioactinium. 

Institut de Biologie Physico-Chimique (IBPC), CNRS, 13, rue Pierre et Marie Curie - 75005 Paris, France... 

Laboratoire de Reactivite de Surface, UMR 7609 - CNRS, Universite Pierre et Marie Curie, 75252 Paris Cedex 05, France and Institut Universitaire de France. 

On November 8, she embarked for France to return once more to the laboratory of the Curie Institute. France could not see America outdo her m veneration for this great woman. Before she returned, the French Government voted a million and a half francs for the construction of a huge factory-laboratory for the study of radioactive elements. The plans for this unique laboratory had been outlined by Mme. Curie and Professor Urbain, Director of the Chemical Institute of the University of Paris. 

Actinium is one of the radioactive elements. It has the atomic number 89 and a weight of 227. In a rare form of decay discovered in 1939 by Mile. Marguerite Perey of the Curie Institute in Paris, actinium emits an alpha particle, losing two protons and thus becoming a new element with the atomic... 

Since all isotopes of Fr are radioactive, it was not discovered until 1939 at the Curie Institute in Paris by Marguerite Perey, although the Russian chemist Dimitri Mendeleev predicted its existence. Its name derives from that of France, the country where it was discovered. 

APELGOT, S. Institut Curie, Section Physique et Chimie, 11 Rue Pierreet Marie Curie, 7523II Paris Cedex 05, France [II, 53]... 

Collie dc Fiance, 11 place Marcelin-Berdielot, 75231 Paris Cedex 05, FRANCE PSI, Institut Curie, 11 rue P. et M. Curie, 75231 Paris Cedex 05, FRANCE... 

Institut de Recherche de Chimie Paris/Physical Chemistry of Surfaces, Chimie ParisTech-CNRS, Ecole Nationale Superieure de Chimie de Paris, Paris, France Laboratoire de Chimie Theorique, Universite Pierre et Marie Curie—CNRS, Paris, France... 

Laboratoire de Recherches Organiques de 1 ESPCIjUniver-site P. M. Curie,75005,Paris Hopital Cochin,Institut de Rhumatologie,75014,Paris Laboratoire de Chimie Physique,Universite R. Descartes 75006,Paris... 

Curie, Marie Sklodowska (1867-1934) and Pierre Curie (1859-1906) Polish-bom chemist-physicist Marie was the first woman to teach at the University of Paris. She married French physicist-chemist Pierre Curie in 1895, and the couple collaborated on research into radioactivity, discovering the elements polonium and radium. She and her husband shared the 1903 Nobel Prize in Physics for their work she was the first woman so honored. After her husband died, she continued her research and received the 1911 Nobel Prize in Chemistry, the first person to receive the award in two different disciplines. She founded the Radium (later Curie) Institute. 

Work in our team was supported by Institut Curie, Institut National de la Sante et Recherche Medicale (INSERM), Centre National de la Recherche Scientifique (CNRS), Agence Nationale de la Recherche (ANR), and the "City of Paris."... 

Olivier Sandre, Laboratoire Physicochimie Curie, Institut Curie - Section de Recherche, 26 rue d Ulm, F-75248 Paris CEDEX 05, France. 

There were many chemical attempts to isolate the heaviest alkali metal, which was referred to by the Mendeleevian term eka-cesium for many years. It was found using radiochemical techniques by Marguerite Perey of France in 1939. Working at the Curie Institute in Paris, she found that about 1% of actinium-227 decays via alpha emission, as shown in Equation (12.4), to produce what she named francium, after her homeland ... 

Curie Institute, Research Division, UMR144-CNRS, 75005 Paris, France sibarita curie.fr... 

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