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fluorapatite |
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fluorapatite (flôrap´ n a member of the family of minerals that make up the basic structure of bones and teeth; basically a hydroxapatite form in which fluoride ions replace hydroxyl ions. fluorapatite crystal (kris´t n the crystalline structure that occurs after hydroxyapatite changes into fluorapatite as a result of the tooth being exposed to fluoride. fluorapatite a fluorine-bearing mineral in rock phosphate. Contributes to local fluorine poisoning and also to distant sites if the rock phosphate is mined for livestock feeding as a dietary phosphorus supplement. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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5 mm), colorless, short-prismatic fluorapatite crystals. At locality 5, thomsonite is found as transparent to translucent, colorless to gray, elongated rectangular blades flattened on {001}, as cruciform twins, and as divergent crystal aggregates on altered meionite, diopside and fluorapatite crystals exposed in voids in FPS skarn. Also from Imilchil there are glassy hexagonal prisms of translucent, pale grayish yellow fluorapatite embedded in cavernous masses of drusy milky quartz; the fluorapatite crystals reach 5 cm long, and the matrix ranges from 6 to 10 cm. |
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