coronium

(kəˈrəʊnɪəm)

(Elements & Compounds) a hypothetical element whose existence was proposed in the 19th century to explain a green line seen in the solar coronal spectrum; this is now known to be highly-ionized iron and nickel

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

References in periodicals archive

Egg capsules, eggs and embryos of the southwestern Atlantic gastropod Coronium coronatum (Gastropoda: Muricidae).

Possible Mechanisms of Hatching from Egg Capsules in the Gastropods Crepipatella dilatata and Crepipatella peruviana, Species with Different Modes of Early Development

Like helium, this line was thought to be from an as-yet unknown element, provisionally named coronium. As the periodic table began to fill up, however, there was no place left to put this new element.

UNDERSTANDING SPACE WEATHER: Part II: The Violent Sun: Understanding the causes of short-term solar variability may help in developing capabilities to predict and mitigate the impacts of space weather on our increasingly technological society

According to this theory these lines, once believed caused by an unknown element, called coronium, are due to the extreme ionization of iron atoms in the sun's corona.

June 1941: Coronium

* The story which accompanies the mystical element coronium (or FeXIV) in the corona and its discovery by the likes of Harkness, Young, Grotian, and Edlen [151-153] has been recalled [265-268].

Forty lines of evidence for condensed matter--the sun on trial: liquid metallic hydrogen as a solar building block

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