Whitlockite

Whitlockite is a mineral, an unusual form of calcium phosphate. Its formula is Ca₉(MgFe)(PO₄)₆PO₃OH. It is a relatively rare mineral but is found in granitic pegmatites, phosphate rock deposits, guano caves and in chondrite meteorites. It was first described in 1941 and named for Herbert Percy Whitlock (1868–1948), American mineralogist, Curator, American Museum of Natural History, New York City, NY, US.