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fluorapatite

[floo r-ap-uh-tahyt, flawr-, flohr-] /flʊərˈæp əˌtaɪt, flɔr-, floʊr-/
noun
1.
a crystalline mineral, Ca 5 (PO 4) 3 F, formed from hydroxyapatite in the presence of fluoride, that has a hardening effect on bones and teeth.
Origin
1880-1885
1880-85; < German Fluorapatit; see fluor-, apatite
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for fluorapatite

fluorapatite

/ˌflʊəˈræpətaɪt/
noun
1.
a mineral consisting of calcium fluorophosphate; the most common form of apatite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for fluorapatite

common phosphate mineral, a calcium fluoride phosphate, Ca5(PO4)3F. It occurs as minute, often green, glassy crystals in many igneous rocks, and also in magnetite deposits, high-temperature hydrothermal veins, and metamorphic rocks; it also occurs as collophane in marine deposits. For detailed physical properties, see phosphate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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