Niob

Niobium powder reacts exothermically with Fluoroplast-42 in a stoichiometric mixture and displays onset at 317 °C [23]. 

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Gr. Tantalos, mythological character, father of Niobe) Discovered in 1802 by Ekeberg, but many chemists thought niobium and tantalum were identical elements until Rowe in 1844, and Marignac, in 1866, showed that niobic and tantalic acids were two different acids. The early investigators only isolated the impure metal. The first relatively pure ductile tantalum was produced by von Bolton in 1903. Tantalum occurs principally in the mineral columbite-tantalite. 

Niobium, discovered by Hatchett ia 1801, was first named columbium. In 1844, Rosed thought he had found a new element associated with tantalum (see Tantalum AND tantalum compounds). He called the new element niobium, for Niobe, daughter of Tantalus of Greek mythology. In 1949, the Union of Pure and Apphed Chemistry setded on the name niobium, but in the United States this metal is stiU known also as columbium. Sometimes called a rare metal, niobium is actually more abundant in the earth s cmst than lead. 

One was Ekeberg s tantalum and the other he called niobium (Niobe was the daughter of Tantalus). Despite the chronological precedence of the name columbium, lUPAC adopted niobium in 1950, though columbium is still sometimes used in US industry. Impure niobium metal was first isolated by C. W. Blomstrand in 1866 by the reduction of the chloride with hydrogen, but the first pure samples of metallic niobium and tantalum were not prepared until 1907 when W. von Bolton reduced the fluorometallates with sodium. 

Niob, Niobium, n. niobium (columbium). Niobat, n. niobate (columbate). 

Niob-saure,/. niobic (colutnbic) acid, -wasser-stoff, m. niobium (columbium) hydride. Nippel, m. nipple. nippeQ, v.i. sip. 

Name derived from Niobe, daughter of Tanatalus (Greek mythology) niobium and tantalum always occur together... 

Name derived from Tantalos (from Greek mythology father of Niobe although he stood in water, he could not guench his persistent thirst, a punishment from the gods)... 

Spater hat man auch andere Technetiumisotope durch Kernaufbau aus dem Reinelement Niob (40) bzw. durch Kemabbau aus dem Mischelement Ruthenium (40) dargestellt ... 

Brauer, G. Zur Frage der niederen Oxyde von Niob und fiber ein Niob-Sub-... 

Disilizide des Niobs, Tantals, Vanadiums und Rheniums. Z. Metallkde. 

Niobium (Nb, [Kr]4d45s1), name and symbol after the Greek mythological heroine Niobe (Tantalus daughter). Discovered (1801) by Charles Hatchett. The name niobium is now used in place of the original name columbium . 

Hagen, H., u. A. Sieverts Germanium, Indium, Niob, Titan und Wasser-... 

ORIGIN OF NAME Niobium is named after the Greek mythological figure Niobe who was the daughter of Tantalus. Tantalus was a Greek god whose name is the source of the word "tantalize," which implies torture he cut up his son to make soup for other gods. 

ORIGIN OF NAME Tantalum was named after Tantalus, who was the father of Niobe, the queen of Thebes, a city in Greek mythology. (Note The element tantalum was originally confused with the element nobelium.)... 

Violetta cried out and faked a dizzy spell, so I could whisk her out into the fresh sea breeze. I had assumed she was pretending, but even out on the fondamenta she was unusually subdued. That was Niobe showing as Medea she could have tom the captain apart with a smile on her face. 

The element was discovered in 1801 by British chemist Charles Hatchett during analysis of a black mineral sample from the British Museum, originally sent in 1753 from Connecticut. He named the element columbium, after the country of its origin, Columbia (United States). In 1844, Rose announced the discovery of a new element which he named as niobium, in honor of Niobe, the daughter of Tantalus, the mythological Goddess of Tears. Later, it was established that Hatchett s columbium and Roses niobium were the same element. Both names remained in use for more than one hundred years. In 1949 at the Fifteenth International Union of Chemistry Congress held at Amsterdam, the name niobium was officially adopted as the international name. 

Tantalum was discovered by the Swedish chemist Anders Ekeberg in 1802, although for a long time after his discovery many chemists believed tantalum and niobium were the same element. In 1866, Marignac developed a fractional crystallization method for separation of tantalum from niobium. Ekeberg named the element in honor of Tantalus, who was Niobe s father in Greek mythology. 

Bode, H., and H. v. Dohren tJber die Kristallstrukturen komplexer Fluoride des Niobs und Tantals. Naturwissenschaften 44, 179 (1957). 

Das Kaliumfluorid wird nach der eigentlichen Reaktion zugesetzt, um das entstandene Chlor-tributyl-stannan als unlosliches polymeres Fluorid abzuscheiden bei gleichzeitiger Bildung eines wasserldslichen Tmino-niob-Komplexes, der dann alkalisch hydrolysiert wird. 

Niob (j)5-Pentamethyl-cyclopenta-dienyl)-tetru(luoro- ElOa, 507 (NbCl4 - NbF4)... 

Well, I m sorry about the old man, Violetta said softly. I am glad we don t have to suspect poor Bianca. She was Niobe, an aspect of her I rarely see, the sorrowing mother. Bellini or del Piombo would have taken one look at her and painted her at the foot of the cross for all eternity to admire. 

Niobium Nb 41 Charles Hatchet England Greek word "Niobe" meaning "daughter of Tantalus"... 

Tantalum Ta 73 Anders Ekeberg Sweden Greek word "Tantalos" meaning "father of Niobe"... 

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