It occurs associated with turquoise, chalcosiderite, cyrilovite, torbernite, libethenite, sampleite, saleeite and fluorapatite.
12.
Fluorapatite resists attacks by acids better than apatite itself, so the tooth enamel resists decay better than enamel containing no fluoride.
13.
During digestion of apatite with sulfuric acid to make phosphoric acid, hydrogen fluoride is produced as a byproduct from any fluorapatite content.
14.
The presence of fluoride in saliva speeds up crystal precipitation forming a fluorapatite-like coating which will be more resistant to caries.
15.
It is found in association with fluorapatite, wavellite, phosphosiderite, strengite, aldermanite, cacoxenite, variscite, turquoise, fluorite and quartz.
16.
Initially, researchers hypothesized that fluoride helped by converting tooth enamel from the more acid-soluble mineral hydroxyapatite to the less acid-soluble mineral fluorapatite.
17.
Fluorapatite as a naturally occurring impurity in apatite generates hydrogen fluoride as a byproduct during the production of phosphoric acid, as apatite is digested by sulfuric acid.
18.
Fluorapatite ( Ca 5 ( PO 4 ) 3 F ) is mined along with other apatites for its phosphate content and is used mostly for production of fertilizers.
19.
The mineral was named apatite by the German geologist Abraham Gottlob Werner in 1786, although the specific mineral he had described was reclassified as fluorapatite in 1860 by the German mineralogist Karl Friedrich August Rammelsberg.
20.
The " biomimetic hydroxylapatite " is intended to protect the teeth by creating a new layer of synthetic enamel around the tooth instead of hardening the existing layer with fluoride that chemically changes it into fluorapatite.
