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erionite

noun
er·​i·​o·​nite | \ˈerēəˌnīt\
plural -s

Definition of erionite 

: 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)

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History and Etymology for erionite

Greek erion wool + English -ite

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