erionite

noun

er·​i·​o·​nite

ˈerēəˌnīt

plural -s

: a mineral NaKCaAl₄Si₁₂O₃₂.12H₂O consisting of zeolitic aluminosilicate of sodium, potassium, and calcium occurring in aggregates of orthorhombic fibrous white crystals resembling wool (specific gravity 2)

Word History

Etymology

Greek erion wool + English -ite

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