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Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus , a figure in Greek mythology. [ 11 ] Tantalum is a very hard, ductile , lustrous , blue-gray transition metal that is highly corrosion-resistant.
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(Sc x Ta 1-x ...
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The pure tantalum hydrogen fluoride solution is then neutralised with aqueous ammonia to give hydrated tantalum oxide (Ta 2 O 5 (H 2 O) x), which is calcinated to tantalum pentoxide (Ta 2 O 5) as described in these idealized equations: [3] H 2 [TaF 7] + 5 H 2 O + 7 NH 3 → 1 / 2 Ta 2 O 5 (H 2 O) 5 + 7 NH 4 F Ta 2 O 5 (H 2 O) 5 → Ta 2 ...
1: Extremely rare on the Earth's surface (less than 1×10 −7 %, i.e. less than 1/10 as common as the least common essential element, selenium), thus has low potential for any kind of biological role. a: Toxic in some molecular forms. b: Radioactive. c: Has uses in medicine as a drug or implant.
Data from flight tracker FlightAware showed a plane leaving the small airport at 2:07 p.m. before its flight ended at 2:09 p.m., which is the time that police said they received a notification ...
Ozin, G. A.; Walton, R. A. (1970). "Vibrational spectra and structures of the 1:1 complexes of niobium and tantalum, pentachlorides and tantalum pentabromide with aceto-, perdeuterioaceto-, and propionitriles in the solid and solution states and a vibrational analysis of the species MX 5, NC·CY 3 (Y = H or D)". J. Chem. Soc. A: 2236– 2239.
Stanley is recalling 2.6 million mugs sold in the U.S. after the company received dozens of consumer complaints, including some users who reported getting burned and requiring medical attention ...