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Many oxides of tantalum are called tantalates. They are viewed as derivatives of "tantalic acid", hypothetic compounds with the formulas Ta 2 O 5 ·nH 2 O [ 1 ] or HTaO 3 [ 2 ] ). Examples of such tantalates are lithium tantalate (LiTaO 3 ), lutetium tantalate (LuTaO 4 ), neodymium tantalate (NdTaO 4 ) and lead scandium tantalate (PST or Pb ...
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 ...
[119] [120] [121] For oral administration the toxicity is lower; a study with rats yielded a LD 50 after seven days of 940 mg/kg. [119] Compounds containing tantalum are rarely encountered in the laboratory, and it and its compounds rarely cause injury, and when they do, the injuries are normally rashes. [19]
With the addition of squarate or perchlorate, the tantalum complex dimerises in acetonitrile, with their respective chelating ligands bridging the Ta centres. These seven-coordinate complexes of the form TaMe 3 L 2 , where L is a bidentate monoanion, are markedly more thermally stable than their precursor, decomposing in the range 80 - 120°C.
Tantalum alkylidene complexes arise by treating trialkyltantalum dichloride with alkyl lithium reagents. This reaction initially forms a thermally unstable tetraalkyl-monochloro-tantalum complex, which undergoes α-hydrogen elimination, followed by alkylation of the remaining chloride.
HLM is a mining exploration company that is actively exploring for the rare metals lithium, cesium, tantalum, and rubidium by currently focusing on its 100% owned and optioned Pakeagama Rare ...
The article AVX's Supply of Tantalum Ore Not Affected by Dar es Salaam Mineral Thefts originally appeared on Fool.com. Try any of our Foolish newsletter services free for 30 days .
The mineral group tantalite [(Fe, Mn)Ta 2 O 6] is the primary source of the chemical element tantalum, a corrosion (heat and acid) resistant metal.It is chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral guides.