fluorapatite

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flu·or·ap·a·tite

 (flo͞o′ôr-ăp′ə-tīt′, -ər-)
n.
A hard, variously colored apatite mineral, calcium fluoride phosphate, Ca5F(PO4)3, that is the most common phosphate mineral and is used in the manufacture of fertilizers. Fluorapatite is formed in tooth enamel exposed to fluoride and helps prevent decay by its resistance to acidity. Also called apatite.

fluorapatite

(ˌflʊəˈræpətaɪt)
n
(Geological Science) a mineral consisting of calcium fluorophosphate; the most common form of apatite
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fluorapatite - a form of apatite in which fluorine predominates over chlorine
atomic number 9, fluorine, F - a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
apatite - a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
References in periodicals archive ?
The main crystal stands over 10 cm tall, and is set off by a small pink fluorapatite crystal and the finely crystallized white calcite crystal matrix.
XRD patterns also indicated the formation of the lithium aluminium silicate: virgilite and fluorapatite crystals. Both crystals have a rounded or spherical-like shape similar to [Li.sub.2]Si[O.sub.3] and [Li.sub.3]P[O.sub.4] but smaller in size, which is hardly to find by either SEM technique or energy dispersive spectroscopy (EDS) [41].
Some areas, typically biotite-bearing, are enriched by green acicular aegirine, aggregates of well-shaped equant crystals (up to 3 mm) of ilmenite with strong metallic luster, and small (up to 0.5 mm), colorless, short-prismatic fluorapatite crystals. Nests (up to 2 cm) of softly fibrous grayish white lorenzenite, strongly fluorescent greenish yellow in shortwave ultraviolet light, occur in the interstices between the natrolite crystals.
And from a find at Bulochi in early 2007 come nice small-cabinet specimens showing sharp, short-prismatic, pale pink fluorapatite crystals, all between 3 and 4 cm, resting lightly on albite, with pale brown muscovite "books" to 3 cm.
First, transparent, pale grayish yellow, elongated fluorapatite crystals form curving parallel aggregates, familiarly called "scorpions"; these aggregates are not especially attractive but many of the fluorapatite crystals are weirdly hollow, and the groups reach lengths of 25 cm.
The better one is a 4 x 4-cm cluster in which lustrous, grayish purple, semi-gemmy, short-prismatic fluorapatite crystals are beautifully arrayed around a central 2 X 3.5-cm crystal.