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Tantalum greatly increases the armor penetration capabilities of a shaped charge due to its high density and high melting point. [78] [79] It is also occasionally used in precious watches e.g. from Audemars Piguet, F.P. Journe, Hublot, Montblanc, Omega, and Panerai. Tantalum oxide is used to make special high refractive index glass for camera ...
Tantalum ores often contain significant amounts of niobium, which is itself a valuable metal.As such, both metals are extracted so that they may be sold. The overall process is one of hydrometallurgy and begins with a leaching step; in which the ore is treated with hydrofluoric acid and sulfuric acid to produce water-soluble hydrogen fluorides, such as the heptafluorotantalate.
There are 2 parts per million of tantalum in the Earth's crust, making it the 51st most abundant element there. Soil contains on average 1 to 2 parts per billion of tantalum, and seawater contains 2 parts per trillion of tantalum. A typical human contains 2.9 parts per billion of tantalum. Tantalum is found in the minerals tantalite and ...
2 Ta + 5 Cl 2 → 2 TaCl 5 2 Ta + 10 HCl → 2 TaCl 5 + 5 H 2. It can also be prepared by a reaction between tantalum pentoxide and thionyl chloride at 240 °C Ta 2 O 5 + 5 SOCl 2 → 2 TaCl 5 + 5 SO 2. Tantalum pentachloride is commercially available, however samples can be contaminated with tantalum(V) oxychloride (TaOCl 3), formed by hydrolysis.
Tantalum diselenide is a compound made with tantalum and selenium atoms, with chemical formula TaSe 2, which belongs to the family of transition metal dichalcogenides. In contrast to molybdenum disulfide (MoS 2 ) [ 1 ] or rhenium disulfide (ReS 2 ), [ 2 ] tantalum diselenide does not occur spontaneously in nature, but it can be synthesized.
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Treatment of tantalum pentachloride with hexamethylbenzene (C 6 Me 6), aluminium, and aluminium trichloride gives [M(η 6-C 6 Me 6)AlCl 4] 2. [7] Tantalum-alkyne complexes [8] catalyze cyclotrimerizations. [9] [10] Some tantalum-alkyne complexes are precursors to allylic alcohols. [11] Tantalacyclopropenes are invoked as intermediates.
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