Talk:Europium
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Information Sources
editSome of the text in this entry was rewritten from Los Alamos National Laboratory - Europium. Data for the table WERE obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but was reformatted and converted into SI units.
Spectral lines of Europium in "light pollution"
editA very recent spectrum of an (unidentified) city light polluted sky shows two emission lines in the visible spectrum at (approximately, I was doing this by eyeball alone :D ) 377 and 536 nanometres, respectively. These were tentatively identified as neutral Europium (Eu I). What would be the source of this? An additive in the fluorescent coating of mercury vapour lighting? An additive in other metal vapour or metal halide lighting? The glow of a television set very close to the point of observation? Some form of white-light LED lighting? Or is this more likely an erroneous identification?
Multiple refs
editHere are some (IMHO) questionable referencing practices:
- "Europium metal is available through the electrolysis of a mixture of molten EuCl3 and NaCl (or CaCl2) in a graphite cell, which serves as cathode, using graphite as anode. The other product is chlorine gas.[27][38][39][40][41]"
- "the discovery of europium is... was able to isolate it in 1901; he then named it europium.[50][51][52][53][54]"
- "it was the fluorite found here that fluorescence was named after in 1852, although it was not until much later that europium was determined to be the cause.[31][32][33][34][35]"
I already removed multiple refs for the use of Eu reagents in nuclear magnetic resonance spectroscopy, but maybe experts want to distill down some of the above 15 refs. --Smokefoot (talk) 21:21, 3 July 2022 (UTC)
Europium has been claimed to become a superconductor
editThis paragraph about a retracted paper should just be deleted IMO. @Smokefoot ? Johnjbarton (talk) 23:15, 18 July 2024 (UTC)
- I support the deletion. All kinds of unreliable stuff creeps into these articles.--Smokefoot (talk) 23:23, 18 July 2024 (UTC)
