hannayite
noun
han·nay·ite
ˈhanēˌīt
plural -s
: a mineral Mg3(NH4)2H4(PO4)4.8H2O consisting of a hydrous acid ammonium magnesium phosphate occurring in guano
Word History
Etymology
German hannayit, from J. B. Hannay, 19th century Scottish chemist + German -it -ite