fluorapatite


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fluorapatite

[flu̇·′rap·ə‚tīt]
(mineralogy)
Ca5(PO4)3F A mineral of the solid-solution series of the apatite group; common accessory mineral in igneous rocks.
An apatite mineral in which the fluoride member dominates.
References in periodicals archive ?
Grondahl, Synthesis and characterization of hydroxyapatite, fluoride-substituted hydroxyapatite and fluorapatite, J.
Gross, Influence of fluorapatite on the properties of thermally sprayed hydroxyapatite coatings, Biomaterials 25, 4935-4945 (2004).
Calcite and fluorapatite disappeared from the residue after treatment with 5% HCl solution.
10% HNO3 solution is enough to dissolve all fluorapatite present in the sample whereas 20% HNO3 solution was enough to dissolve almost all carbonates.
Test results have confirmed that fluorapatite nanoparticles have low solubility, desirable cellular adhesion, and suitable phosphate activity.
Stressing that the Iranian researchers' studies show that the addition of fluorapatite nanoparticles has a significant effect on mechanical properties and corrosive and biological behavior of AZ91 magnesium alloy, Razavi said, "In addition, magnesium-fluorapatite composites have a better corrosion resistance compared with magnesium alloys.
The addition of fluorapatite nanoparticles as reinforcement agent to AZ91 magnesium alloy improves and speeds up the formation of pseudo-bone apatite on the surface, thus, it provides a better protection.
Apart from Egyptian RP, the solubility of the apatite RPs became similar for higher calcination temperatures presumably due to fluorapatite replacing the more soluble francolite (Khasawneh and Doll 1978).
Conversion of microcrystalline francolite towards larger crystals of fluorapatite in a sintered mass, as indicated by the increase in UCD a, increased crystal size, and reduced surface area, are responsible for the decrease in relative effectiveness.
But instead of the previous hydroxy apatite, it's an even more stable mineral, fluorapatite.
Uranium at Nuottijarvi is present as uraninite associated with fluorapatite, within a 40 metre wide mineralized breccia, hosted by a carbonate-apatite horizon at the contact between quartzite and graphite-bearing phyllite.