duplexite

noun

du·​plex·​ite

ˈd(y)üˌplekˌsīt

plural -s

: a mineral perhaps Be₄Ca₆Al₂Si₁₄O₄₁.2H₂O consisting of hydrous beryllium calcium aluminosilicate

Word History

Etymology

S. Duplex, 20th century Australian quarry manager who found it + English -ite

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