HANNAYITE

ˈhanēˌīt noun

( -s )

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

: a mineral Mg 3 (NH 4 ) 2 H 4 (PO 4 ) 4 .8H 2 O consisting of a hydrous acid ammonium magnesium phosphate occurring in guano