A sodium and iron-rich variety of pyroxene mineral, essentially another name for aegirine, used interchangeably in mineralogical literature.
From Aegir (Norse sea god) plus the mineral suffix -ite (from Greek lithos). This variant terminology reflects different historical naming conventions in European mineralogy.
Aegirite and aegirine are literally the same mineral but with different names—a quirky reminder that scientific nomenclature isn't always perfectly organized, and historical naming accidents can persist for centuries.
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