NASA site spells it the same. Presumably it's how physicists call ions. | Hacker News

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		guard-of-terra on July 26, 2014 \| parent \| context \| favorite \| on: Mystery in the Perseus Cluster NASA site spells it the same. Presumably it's how physicists call ions.

tinco on July 26, 2014 [–]

I learned to spell ions like that in highschool, though never more than Fe III, I think.

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