plural -s
: 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

Word History


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

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Dictionary Entries Near arfvedsonite

Cite this Entry

“Arfvedsonite.” Dictionary, Merriam-Webster, Accessed 23 Jul. 2024.

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