Wiktionary
n. (context mineralogy English) A rare form of calcium phosphate.
Wikipedia
Whitlockite is a mineral, an unusual form of calcium phosphate. Its formula is Ca(Mg Fe)(PO)POO H. 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.
With regards to periodontal dentistry, magnesium whitlockite comprises one component of many of the inorganic content of calculus. It is found primarily in subgingival calculus (as opposed to supragingival calculus). It is also found more in posterior as opposed to anterior regions of the oral cavity.
Usage examples of "whitlockite".
In situ investigation of the brecciated diabase in SNC Crater and surrounding region reveal that ilmenite and whitlockite are missing from this inventory.
The maskelynite is zoned, with accessory phases of titanomagnetite, ilmenite, pyrrhotite, fayalite, tridymite, whitlockite, chlorapatite, and baddeleyite.