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The claimed new elements pelopium, ilmenium, and dianium [19] were in fact identical to niobium or mixtures of niobium and tantalum. [20] The differences between tantalum and niobium were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand [20] and Henri Étienne Sainte-Claire Deville, as well as Louis J. Troost, who determined ...
[15] [16] This confusion arose from the minimal observed differences between tantalum and niobium. The claimed new elements pelopium, ilmenium, and dianium [17] were in fact identical to niobium or mixtures of niobium and tantalum. [18] Pure tantalum was not produced until 1903. [19]
Tantalite has the same mineral structure as columbite (Fe, Mn) (Ta, Nb) 2 O 6; when there is more tantalum than niobium it is called tantalite and when there is more niobium than tantalum is it called columbite (or niobite). The high density of tantalite and other tantalum containing minerals makes the use of gravitational separation the best ...
We can think of the tantalum straight wire as a "gate" and the coiled niobium as a "control". The article by Buck [ 2 ] includes descriptions of several logic circuits implemented using cryotrons, including: one stage of a binary adder, carry network, binary accumulator stage, and two stages of a cryotron stepping register.
The similar reactivity of niobium and tantalum complicated preparation of pure samples and therefore several new elements were proposed, which were later found to be mixtures of niobium and tantalum. The differences between tantalum and niobium and the fact that no other similar element was present were unequivocally demonstrated in 1864 by ...
"The differences between tantalum and niobium were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand, and Henri Etienne Sainte-Claire Deville, as well as Louis J. Troost, who determined the formulas of some of the compounds in 1865 and finally by the Swiss chemist Jean Charles Galissard de Marignac, in 1866, who all proved that ...
The differences between tantalum and niobium and the fact that no other similar element was present were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand, [4] and Henri Etienne Sainte-Claire Deville, as well as by Louis J. Troost, who determined the formulas of some of the compounds in 1865 [4] [5] and finally by the Swiss ...
Most commonly, conventional superconductors such as niobium–titanium are used, [1] but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.
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