A mineral variety or related mineral species; a technical term used in crystallography or mineralogy (rare or historical).
From 'exchange' + -ite (mineralogical suffix). The -ite suffix is used to name minerals and rocks, often (but not always) after their origin, discoverer, or properties.
Mineral names ending in -ite tell stories—some honor scientists (smithsonite), some describe properties (magnetite), and some describe geological processes; 'exchangite' likely refers to a mineral where ion exchange occurs, a process crucial to soil chemistry and water purification.
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