arfvedsonite

noun
arf·​ved·​son·​ite | \ ˈävə̇dsəˌnīt\
plural -s

Definition of arfvedsonite

: a silicate of sodium, calcium, and iron, approximately Na2–3(Fe, Mg, Al)5Si8O22(OH)2, of the amphibole group occurring in black monoclinic strongly pleochroic prisms in certain igneous rocks

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History and Etymology for arfvedsonite

J. A. Arfvedson †1841 Swedish chemist + English -ite

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