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 ?
Among specific topics are tailoring collectors to allow sea water usage in phosphate beneficiation, recovering rare earth elements from phosphate rock and phosphate mining waste products using a novel heterogeneous adsorption polymer, how phosphate rock quality impacts the phosphoric acid plant and the granulation plant operations, the effect of calcium concentrate on calcite flotation from apatite using carbonic gas, and a comparative study of different column sizes for ultrafine apatite flotation.
During the meeting, Acron reported on its performance of a government contract that is part of a project to develop industrial technologies for recovering REE concentrate at existing apatite concentrate processing facilities.
The memorandum of cooperation has been signed for the construction of a specialised marine terminal for the transhipment of mineral fertilizers and apatite concentrate at the seaport of Murmansk.
In the article titled "Osteogenic Differentiation of hDPSCs on Biogenic Bone Apatite Thin Films" [1], the second affiliation was incorrect.
Apatite [[Ca.sub.5][(P[O.sub.4]).sub.3](F,OH)] forms a large family of minerals due to many isomorphous substitutions, which play a very important role in numerous industrial, medical, and environmental processes [1-3].
The vibrational spectra of silicate apatite samples were recorded using a Renishaw inVia micro-Raman spectrometer under 488 nm laser radiation at room temperature as described earlier [18].
The dominating biogenic compounds are: (i) calcite as < 5 m[micro] micrite forming the groundmass mudstone, and both micrite of the matrix and > 5 m[micro] to 1 mm grains--skeletal particles (shells and their broken fragments) in wackestone, (ii) silica as < 5 m[micro] particles belonging to the groundmass of mudstone and wackestone matrix, (iii) organic matter (kerogen) in the mudstone and matrix of wackestone, (iv) phosphate skeletal fragments in certain interbeds of wackestone and very fine apatite in groundmass.
The test site is the Northern Hemisphere's largest source of apatite, which is ranked five of 10 on the Mohs hardness scale.
The inorganic component comprises well-defined and tightly-packed nano apatite crystals of calcium and phosphate with small amounts of trace elements.
(e) Early mineralisation stage with patchy distribution of bone apatite (dark areas).
[14] found that addition of 5% (w/w) WF reinforces the compressive strength of an apatite CPC by 250% compared to nonreinforced CPC (from 14.5 to 50.4 MPa).
Carbonatites have gained considerable economic significance because of their newly recognized importance in producing large-scale sources of niobium, cerium, apatite, magnetite, barite, vermiculite, phosphorus, tantalum, uranium, thorium, copper, iron, titanium, vanadium, barium, fluorine, zirconium, and other rare or incompatible elements.