elpidite

noun

el·​pi·​dite

ˈelpəˌdīt

plural -s

: a mineral Na₂ZrSi₆O₁₅.3H₂O consisting of a hydrated sodium zirconium silicate

Word History

Etymology

Swedish elpidit, from Greek elpid-, elpis hope + Swedish -it -ite; from the expectation of finding other minerals in the same locality

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