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Tantalum pentoxide (Ta 2 O 5) is the most important compound from the perspective of applications. Oxides of tantalum in lower oxidation states are numerous, including many defect structures, and are lightly studied or poorly characterized. [38] Tantalates, compounds containing [TaO 4] 3− or [TaO 3] − are numerous.
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 ...
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 ...
[4] 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 ...
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.
The first reported detection was by a team at the Joint Institute for Nuclear Research (JINR), which in 1968 had produced the new element by bombarding an americium-243 target with a beam of neon-22 ions, and reported 9.4 MeV (with a half-life of 0.1–3 seconds) and 9.7 MeV (t 1/2 > 0.05 s) alpha activities followed by alpha activities similar ...
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Tantalum(III) chloride or tantalum trichloride is non-stoichiometric chemical compound with a range of composition from TaCl 2.9 to TaCl 3.1 [2] Anionic and neutral clusters containing Ta(III) chloride include [Ta 6 Cl 18] 4− and [Ta 6 Cl 14](H 2 O) 4. [3] Structure of edge-capped octahedral clusters such as Ta 6 Cl 18 2−. [4]