Pronunciation: [kˈaθi͡ən] (IPA)
Correct spelling for the English word "cathion" is [kˈaθi͡ən], [kˈaθiən], [k_ˈa_θ_iə_n] (IPA phonetic alphabet).
Cation.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Correct spelling for cathion