halloysite

noun

hal·​loy·​site

həˈlȯiˌsīt,

haˈ-,

-ˌzīt

plural -s

: a clay mineral Al₂Si₂O₅(OH)₄.n H₂O occurring in soft white or light-colored masses and in at least two states of hydration n =2, n =4

Word History

Etymology

French, from Omalius d'Halloy †1875 Belgian geologist + French -ite

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