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Niobium has no known biological role. While niobium dust is an eye and skin irritant and a potential fire hazard, elemental niobium on a larger scale is physiologically inert (and thus hypoallergenic) and harmless. It is often used in jewelry and has been tested for use in some medical implants. [130] [131]
While niobium dust is an eye and skin irritant [19] and a potential fire hazard, elemental niobium on a larger scale is physiologically inert (and thus hypoallergenic) and harmless. It is often used in jewelry and has been tested for use in some medical implants. [117] [118] Niobium and its compounds thought to be slightly toxic. Short- and ...
Pages in category "Niobium minerals" The following 41 pages are in this category, out of 41 total. This list may not reflect recent changes. A. Achalaite; Aeschynite-(Y)
Pages in category "Niobium" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...
Pyrochlore (Na,Ca) 2 Nb 2 O 6 (OH,F) is a mineral group of the niobium end member of the pyrochlore supergroup. Pyrochlore is also a term for the crystal structure Fd 3 m.The name is from the Greek πῦρ, fire, and χλωρός, green because it typically turns green on ignition in classic blowpipe analysis.
Niobium-92 is an extinct radionuclide [6] with a half-life of 34.7 million years, decaying predominantly via β + decay. Its abundance relative to the stable 93 Nb in the early Solar System, estimated at 1.7×10 −5 , has been measured to investigate the origin of p-nuclei .
The mineral columbite The element niobium. In 1846, Rose rediscovered the chemical element niobium, proving conclusively that it was different from tantalum. This confirmed that Charles Hatchett had discovered niobium in 1801 in columbite ore. Hatchett had named the new element "columbium", from the ore in which niobium and tantalum coexist.
Organoniobium chemistry is the chemistry of compounds containing niobium-carbon (Nb-C) bonds. Compared to the other group 5 transition metal organometallics, the chemistry of organoniobium compounds most closely resembles that of organotantalum compounds.