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apatite
(redirected from Apatites)

    Also found in: Medical, Wikipedia, Hutchinson 0.01 sec.
apatite (ăp`ətīt), mineral, a phosphate of calcium containing chlorine or fluorine, or both, that is transparent to opaque in shades of green, brown, yellow, white, red, and purple. Apatite is a minor constituent in igneous and metamorphic rocks. Yellow-green asparagus stone and blue-green manganapatite are used in jewelry. Apatite is mined to make phosphatic fertilizers and is used in fission track dating of rocks (see dating dating, the determination of the age of an object, of a natural phenomenon, or of a series of events. There are two basic types of dating methods, relative and absolute.
..... Click the link for more information. ). Commercial deposits are mined in Idaho, Tennessee, and Wyoming, and in N Africa and Russia.

apatite

A member of the phosphate group of minerals, the world's major source of phosphorus, found as variously coloured, glassy crystals, masses, or nodules. Much of it has a chemical composition approximating Ca5(PO4)3(F,Cl,OH). If not for its softness, apatite would be a popular gemstone; some of the material found is clear, but it is fragile and difficult to cut and polish.
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Because HA is the prototype of biological apatites, which are in nano crystalline forms, extensive efforts have been made to produce synthetic nano HA materials.
Properties of nanostructured hydroxyapatite prepared by a spray ... by Hockey, Bernard / Journal of Research of the National Institute of Standards and Technology
In one of the Japanese studies, scientists from the Biomaterials Laboratory, Faculty of Engineering at Okayama University in Japan examined the blood compatibility and protein adsorption of hydroxyapatite and hydroxyl-carbonate apatites.
MIV Therapeutics Claims of Total Biocompatibility of Hydroxyapatite ... by Business Wire
In general, these impure biological apatites are designated as calcium deficient or non-stoichiometric apatites.
Preparation and comprehensive characterization of a calcium ... by Tung, Ming S. / Journal of Research of the National Institute of Standards and Technology
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