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For example, porous tantalum coatings are used in the construction of titanium implants due to tantalum's exceptional ability to form a direct bond to hard tissue. [74] Because tantalum is a non-ferrous, non-magnetic metal, tantalum implants are considered to be acceptable for patients undergoing MRI procedures.
In 1809, English chemist William Hyde Wollaston compared the oxides derived from both columbium—columbite, with a density 5.918 g/cm 3, and tantalum—tantalite, with a density over 8 g/cm 3, and concluded that the two oxides, despite the significant difference in density, were identical; thus he kept the name tantalum. [14]
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.
Equipment such as medical electronics and space equipment that require high quality and reliability makes use of tantalum capacitors. An especially common application for low-voltage tantalum capacitors is power supply filtering on computer motherboards and in peripherals, due to their small size and long-term reliability.
Although some plants bioaccumulate gold, no living organism is known to require it. There are medical uses, including treatment of rheumatoid arthritis and fabrication of dental implants. [11] Some gold salts used in medicine have adverse side effects. hafnium: 72: 2: Has no known biological role. [11] Salts have low toxicity. [11] helium: 2: 2
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.
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 ...
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.