dannemorite

noun

dan·​ne·​mo·​rite

ˌdanəˈmōrˌīt

plural -s

: a mineral (Fe,Mn,Mg)₇Si₈O₂₂(OH)₂ consisting of a columnar or fibrous amphibole containing iron, magnesium, and manganese

Word History

Etymology

Swedish dannemorit, from Dannemora, Sweden, + Swedish -it -ite

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