What is Coronium?
[[File:Solar eclipse 1999 4.jpg|right|thumb|A solar eclipse]] '''Coronium''' was thought to be a [[chemical element]] in 1882. The evidence was a thin green [[spectroscopy|spectrometry]] line in the [[solar corona]]. In 1930, it was proved that it did not exist. The green line was just highly [[Ionization|ionized]] [[iron]], (Fe<sup>13+</sup>), which is now called coronium. [[Category:Spectroscopy]] [[Category:Iron]] {{chem-stub}}