Mineralogy and Crystallography

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apatite

A Dictionary of Earth Sciences | 1999 | | Copyright

apatite A widely distributed phosphate mineral, with the formula Ca₅(PO₄)₃(F,Cl,OH); sp. gr. 3.1–3.3; hardness 5; hexagonal; usually a shade of green or grey-green, but may also be white, brown, yellow, bluish, or red; white streak; vitreous lustre; crystals commonly hexagonal prisms, and often tabular, also occurs massive, and granular; cleavage, basal {0001}, imperfect prismatic {1010}; found as an accessory mineral in igneous rock, in pegmatites and high-temperature hydrothermal veins, and in metamorphic rocks. It is the principal constituent of fossil bones (see also COLLOPHANE). Apatite is widely used as a phosphate fertilizer, and for the production of phosphoric acid and various other chemicals.

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AILSA ALLABY and MICHAEL ALLABY. "apatite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "apatite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O13-apatite.html

AILSA ALLABY and MICHAEL ALLABY. "apatite." A Dictionary of Earth Sciences. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-apatite.html

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apatite

A Dictionary of Biology | 2004 | Copyright

apatite A complex mineral form of the salt calcium phosphate, Ca₅(PO₄)₃(OH,F,Cl), that is the main constituent of the enamel of teeth.

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"apatite." A Dictionary of Biology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O6-apatite.html

"apatite." A Dictionary of Biology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-apatite.html

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Free newspaper and magazine articles

	Apatite.(Jewel of the Month) Magazine article from: Jewelers Circular Keystone; 11/1/2004
	ORTHOPAEDICS: Apatite-organic polymer composites may prove useful in bone repair Newspaper article from: Biomedical Materials; 2/1/1996
	Nanocrystalline apatite-based biomaterials.(Brief article)(Book review) Magazine article from: SciTech Book News; 6/1/2009