eldfellite

== English == === Etymology === Named for type locality, Eldfell volcano, Heimaey, Iceland +‎ -ite. === Noun === eldfellite (uncountable) (mineralogy) The mineral NaFe(SO4)2 that may be used as a cathode in sodium-ion batteries === References === “eldfellite”, in Mindat.org‎[2], Hudson Institute of Mineralogy, 2000–2026.