hannayite

noun
han·​nay·​ite | \ˈhanēˌīt\
plural -s

Definition of hannayite 

: a mineral Mg3(NH4)2H4(PO4)4.8H2O consisting of a hydrous acid ammonium magnesium phosphate occurring in guano

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History and Etymology for hannayite

German hannayit, from J. B. Hannay, 19th century Scottish chemist + German -it -ite

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