apatite


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ap·a·tite

 (ăp′ə-tīt′)
n.
1. Any of a group of natural, variously colored calcium phosphate minerals containing fluorine, chlorine, or hydroxyl. These compounds form hexagonal crystals and are components of bones and teeth, are a source of phosphorus for plants, and are used in the manufacture of fertilizers.

[From Greek apatē, deceit (from its often being mistaken for other minerals).]

apatite

(ˈæpəˌtaɪt)
n
(Minerals) a pale green to purple mineral, found in igneous rocks and metamorphosed limestones. It is used in the manufacture of phosphorus, phosphates, and fertilizers. Composition: calcium fluorophosphate or calcium chlorophosphate. General formula: Ca5(PO4,CO3)3(F,OH,Cl). Crystal structure: hexagonal
[C19: from German Apatit, from Greek apatē deceit; from its misleading similarity to other minerals]

ap•a•tite

(ˈæp əˌtaɪt)

n.
a common mineral, calcium fluorophosphate, Ca5FP3O12, occurring in individual crystals and in masses and varying in color, formerly used in the manufacture of phosphate fertilizers.
[1795–1805; < Greek apát(ē) trickery, fraud, deceit + -ite1]

ap·a·tite

(ăp′ə-tīt′)
A usually green, transparent mineral consisting mainly of calcium phosphate. Apatite occurs as hexagonal crystals in igneous, metamorphic, and sedimentary rocks, and is used as a source of phosphate for making fertilizers. It is the mineral used to represent a hardness of 5 on the Mohs scale.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.apatite - a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
atomic number 15, P, phosphorus - a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms
atomic number 65, Tb, terbium - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
atomic number 69, thulium, Tm - a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
fluorapatite - a form of apatite in which fluorine predominates over chlorine
Translations
References in periodicals archive ?
The main factors enhancing the chromium sorption capacity of apatites were their magnesium content and triboactivation, which both increased apatite reactivity.
Spectrometric analysis of the mitral valve vegetations showed that they were composed of calcium phosphate, carbonate apatite form, and fibrin.
Burnstein et al performed x-ray diffraction and chemical analyses of six parotid gland stones and found that the three major crystalline components were apatite, magnesium-substituted whitlockite, and octacalcium phosphate.
With the first commercially applicable technology ever developed, Daikin will release in late August an air purifier that uses a filter having the substance called photocatalytic titanium apatite, the Osaka-based company said.
The 50-percent rule was an impediment, so we decided to accept half the payment in hard currency and to get the other half through a barter arrangement that involved apatite concentrate, a rock phosphate that we couldn't use.
Most of those discussions concerned the use of hydroxy apatite (HA), a mineral with a complex chemistry containing calcium phosphate.
Next year, 1992, Kemira Oy expects to set a new record for apatite production from Siilinjarvi, and is currently developing new mining areas.
These images also demonstrate clear differences between CNPs and inorganic apatite, offering further proof that CNPs are distinct from inorganic apatite particles.
129 thousand tonnes, Apatite & Phosphorite 165 thousand tonnes, Limestone 276 lakh tonnes, Magnesite 16 thousand tonnes and Diamond 5087 carat.
The mineral constituents are K-feldspar (microperthite), plagioclase, quartz, riebekite, hornblende, aegirine-augite, biotite, apatite, zircon, allanite, titanite, epidote, rutile and magnetite.
In January 2014, gem dealer Dudley Blauwet (Dudley Blauwet Gems, Louisville, Colorado, USA) obtained a 600 g parcel of rough apatite that his African supplier indicated was from Nhamatanda, Mozambique.