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- Q1851648 subject Q7430152.
- Q1851648 subject Q7886201.
- Q1851648 subject Q8830645.
- Q1851648 abstract "Pelopium was the proposed name for a new element found by the chemist Heinrich Rose in 1845. The name derived from the Greek king and later god Pelops. During the analysis of the mineral tantalite he concluded that it does contain an element similar to niobium and tantalum. 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 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.This confusion arose from the minimal observed differences between tantalum and niobium. Both tantalum and niobium react with chlorine and traces of oxygen, including atmospheric concentrations, with niobium forming two compounds: the white volatile niobium pentachloride (NbCl5) and the non-volatile niobium oxychloride (NbOCl3). The claimed new elements pelopium, ilmenium and dianium were in fact identical to niobium or mixtures of niobium and tantalum.".
- Q1851648 wikiPageWikiLink Q1046.
- Q1851648 wikiPageWikiLink Q1123.
- Q1851648 wikiPageWikiLink Q124045.
- Q1851648 wikiPageWikiLink Q192485.
- Q1851648 wikiPageWikiLink Q3262363.
- Q1851648 wikiPageWikiLink Q417510.
- Q1851648 wikiPageWikiLink Q4332917.
- Q1851648 wikiPageWikiLink Q487347.
- Q1851648 wikiPageWikiLink Q5271649.
- Q1851648 wikiPageWikiLink Q6000805.
- Q1851648 wikiPageWikiLink Q637080.
- Q1851648 wikiPageWikiLink Q688.
- Q1851648 wikiPageWikiLink Q7430152.
- Q1851648 wikiPageWikiLink Q77286.
- Q1851648 wikiPageWikiLink Q7886201.
- Q1851648 wikiPageWikiLink Q8830645.
- Q1851648 wikiPageWikiLink Q905534.
- Q1851648 comment "Pelopium was the proposed name for a new element found by the chemist Heinrich Rose in 1845. The name derived from the Greek king and later god Pelops. During the analysis of the mineral tantalite he concluded that it does contain an element similar to niobium and tantalum. 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.".
- Q1851648 label "Pelopium".