Tacke, Ida

The isolation and identification of 4 radioactive elements in minute amounts took place at the turn of the century, and in each case the insight provided by the periodic classification into the predicted chemical properties of these elements proved invaluable. Marie Curie identified polonium in 1898 and, later in the same year working with Pierre Curie, isolated radium. Actinium followed in 1899 (A. Debierne) and the heaviest noble gas, radon, in 1900 (F. E. Dorn). Details will be found in later chapters which also recount the discoveries made in the present century of protactinium (O. Hahn and Lise Meitner, 1917), hafnium (D. Coster and G. von Hevesey, 1923), rhenium (W. Noddack, Ida Tacke and O. Berg, 1925), technetium (C. Perrier and E. Segre, 1937), francium (Marguerite Percy, 1939) and promethium (J. A. Marinsky, L. E. Glendenin and C. D. Coryell, 1945). 

Rhenium (75) was discovered in 1925 by Ida Tacke and Walter Noddack as the last naturally occurring element. The first artificially produced element was identified by Emilio G. Segre in 1937. Ernest Lawrence detected technetium in a molybdenum sample, which he had bombarded in his cyclotron. All elements discovered since then have been generated artificially. 

Rhenium - the atomic number is 75 and the chemical symbol is Re. The name derives from the Latin rhenus for the Rhine river in Germany . It was discovered by x-ray spectroscopy in 1925 by the German chemists, Walter Noddack, Ida Tacke and Otto Berg. 

Rhenium Re 1925 (Berlin, Germany) Walter Noddack, Ida Tacke Noddack and Otto Berg (all German) 155... 

Technetium Tc 1925 (Berlin, Germany) 1937 (Berkeley, California) Walter Noddack and Ida Tacke Noddack (both German) Emilio Segre (Italian-American) and Carlo Perrier (Italian) 130... 

German chemists Ida Tacke, Walter Nodack, and Otto Carl Berg Extremely rare useful in making metal alloys wear resistant, especially those used to make electrical contacts. 

The element was discovered in 1925 by Walter Noddack, Ida Tacke Noddack, and 0. Berg. They detected it by x-ray examination of platinum ores. X-ray studies also showed its occurrence in columbite and other minerals. It was named after the German river Rhine, called Rhenus in Latin. In 1929, Walter and Ida Noddack produced Ig of rhenium metal from 660 kg of Norwegian molybdenite. 

Two new elements of the manganese group, numbers 43 (eka-manganese) and 75 (dwi-manganese), were announced in June, 1925, by the German chemists Dr. Walter Noddack and Dr. Ida Tacke of the Physico-Technical Testing Office in Berlin and Dr. Otto Berg of the Werner-Siemens Laboratory. The discovery was not accidental, but the... 

File on W. Noddack s denazification, 1945-1947, K. U. Leuven Archives, Nod-dack-Tacke Papers, 764-769. On the value of the denazification process see R. L. Sime, Lise Meitner, on 356-357 and references therein. Ida was not affected by denazification, though her behavior during the nazi period was under investigation in 1963-1964. Official document, K.U. Leuven Archives, Noddack-Tacke Papers, 1231, and file on the legal investigation of Ida Noddack in 1963-1964, K.U. Leuven Archives, Noddack-Tacke Papers, 1232. 

This interpretation is based on the correspondence of Ida with Otto Honigschmid, 1934-1935. K. U. Leuven Archives, Noddack-Tacke Papers, 1032. 

I. Noddack and W. Noddack, Die Haufig-keit der chemischen Elemente, Die Na-turwissenschafien 18 (1930) 757-764. I. Noddack, Die Haufigkeit der seltenen Er-den in Meteoriten, Zeitschrift fur anorga-nische und allgemeine Chemie 225 (1935) 337-364. Until 1926, Ida Noddack carried her maiden name, Tacke. 

Auer von Welsbach was another chemist who doubted the validity of fhe American results. Finally, the married couple, Ida Noddack (nee Tacke, 1896-1978) and Walter Noddack (1893-1960), embarked upon a quest for fhe element 61. Husband and wife were greatly stimulated by their recent discoveries of masurium and rhenium. The Noddacks, in collaboration with Berg, began their investigations with an enormous amount of rare-earfh minerals (Noddack ef al., 1925). They firsf of all produced a number of very pure samples of neodymium and samarium. They made use of the most sensitive and accurate methods of analysis of fhat time, allowing to detect element 61 if if were 10 million times more rare than neodymium and samarium. However, their work remained without success. 

Rhenium. The element rhenium, atomic number 75, was fliscovered by the Gennan chemists Walter Noddack and Ida Tacke in 1925. The principal compound of rhenium is potassium perrhenate, KReO. a colorless substance. In other compounds all oxidation numbers from -f-7 to —1 are represented examples are RCgOj, ReOg, ReClg, Re02, Re20g, Re(OH)2. 

German chemists Walter Noddack, Ida Tacke, and Otto Berg rediscover and name rhenium. 

The name is from the Rhineland in Germany. In 1908, the Japanese chemist Masataka Ogawa (1865-1933) discovered this element and called it nip-ponium, but he incorrectly assigned it to periodical space 43. In 1925, the research team of Walter Noddack (1893-1960), Ida Eva Tacke (1896-1978, later Ida Noddack), and Otto Berg (1873- ) extracted 1 g of rhenium from molybdenite ore and correctly characterized its properties. Rhenium is relatively rare. Its main uses are in laboratory equipment such as spectrographs, in filaments for photoflash lamps, and in some specialty electrical equipment. 

The name comes from the Greek technetos, meaning artificial. There were claims to have discovered element 43 as early as 1877, based on the predicted existence of eka-manganese. In 1925, Walter Noddack, Ida Tacke, and Otto Berg claimed to have found the element, calling it masurium. Definitive proof was made by Emilio G. Segre (1905-1989) in 1937, who was studying a small piece of radioactive molybdenum created at the Berkeley cyclotron. 

Ida Tacke discovered element number 75, rhenium. Her birthplace, next to the Rhine River, inspired its name. Tacke is also known for pre-... 

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