philipstadite

noun

phil·​ip·​stad·​ite

ˈfilə̇pˌstäˌdīt

plural -s

: a mineral approximately Ca₂(Fe, Mg)₅(Si, Al)₈O₂₂(OH)₂ consisting of silicate of calcium, iron, magnesium, and aluminum and belonging to the amphibole group

Word History

Etymology

Philipstad, Sweden, its locality + English -ite

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