creedite

noun

creed·​ite

ˈkrēˌdīt

plural -s

: a mineral Ca₃Al₂F₄(OH, F)₆(SO₄).2H₂O consisting of hydrous calcium aluminum fluoride with calcium sulfate, occurring in white to colorless grains, and radiating crystalline masses (hardness 2, specific gravity 2.7)

Word History

Etymology

Creede quadrangle (U.S. Geological Survey), southwest Colorado, its locality + English -ite

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