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(ăp`ətīt), mineral, a phosphate of calcium containing chlorine or fluorine, or both, that is transparent to opaque in shades of green, brown, yellow, white, red, and purple. Apatite is a minor constituent in igneous and metamorphic rocks. Yellow-green asparagus stone and blue-green manganapatite are used in jewelry. Apatite is mined to make phosphatic fertilizers and is used in fission track dating of rocks (see datingdating,
the determination of the age of an object, of a natural phenomenon, or of a series of events. There are two basic types of dating methods, relative and absolute.
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). Commercial deposits are mined in Idaho, Tennessee, and Wyoming, and in N Africa and Russia.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a mineral of the calcium phosphate group containing a variable quantity of fluorine and chlorine. The chemical formula of apatite is 3Ca3 (PO4) 2·Ca(F, Cl)2. As secondary admixtures apatite sometimes contains up to 10 percent oxides of manganese, strontium, or rare earth elements; less than 1 percent sodium, potassium, or barium frequently replaces part of the calcium. In addition to F- and Cl-, (OH)-, O2-, and CO32-, are also present. Fluor-, chlor-, hydroxyl-, carbonate-, and oxy-apatite have been isolated, as have been manganapatite, strontium apatite, and rare earth apatite (“belovit”). The theoretical composition P2O5 in fluorapatite and chlorapatite is 42.3 percent and 41.1 percent respectively. Apatite crystallizes in a hexagonal system. Crystals are for the most part hexahedral, prismatic, and elongated to the point of being needlelike; they are rarely tabular. Apatite is also found in the form of cryptocrystalline varieties (col-lophanite). The color and other physical and optical properties change within the bounds of the series of fluor-, chlor-, and hydroxylapatite as well as according to the composition of the admixtures of elements. The green color of apatite is caused by the presence of iron, its blue color by manganese, and its brown and red color by a finely dispersed admixture of hematite. Its cleavage is incomplete; its luster is vitreous and resinous; its hardness on the mineralogical scale is 5; and its density ranges from 3,160 to 3,200 kg/m3 but reaches 3,800–4,200 kg/m3 in varieties enriched with strontium and the rare earths. The melting point is 1660°C for fluorapatite and 1530°C for chlorapatite.

Apatite is widely distributed in rocks and is formed by various geological processes. Large apatite ore accumulations are confined to massive alkaline rocks (nepheline syenites). A high apatite content has also been established in carbonatites and in certain iron ore deposits formed at high temperatures. In addition, apatite is found in granite, pegmatites, quartz veins, crystalline schists. In sedimentary rocks, minerals of the apatite group occur mainly in the form of phosphorites and partly in excavated bones. Because of its relative chemical stability, apatite is found in placers.

Most of the apatite which is mined is utilized in the manufacture of phosphorous fertilizers. In the chemical industry apatite yields phosphoric acid, various salts, phosphorus, and phosphorous compounds. Apatite is also used in ferrous and nonferrous metallurgy and in the ceramic and glass industries.

The world’s largest deposit of apatite is found in the USSR on the Kola Peninsula. Abroad, the largest deposits of apatite are found in the iron ore fields of Sweden (Kierunavaara, Luossavaara) and in the carbonatóte fields of central and eastern Africa.


Bok, I. I. Agronomicheskie rudy, 2nd ed. Alma-Ata, 1965.
Deer, W. A., R. A. Howie, and J. Zussman. Porodoobrazuiushchie mineraly, vol. 5. Moscow, 1966. (Translated from English.)


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A group of phosphate minerals that includes 10 mineral species and has the general formula X5(YO4)3Z, where X is usually Ca2+or Pb3+, Y is P5+or As5+, and Z is F-, Cl-, or OH-.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Apatit Techenicacal (Technical) Director Zvonar Andrey Yurievich said: 'The main priorities in production policy of Apatit OJSC are ensuring stable production of apatite ore, optimised production costs and guaranteed security, especially in blasting works.
However, in 2011 the group generated the net profit (before tax) in the amount of 4.839 billion rubles (about $165 million) via selling of exploration licences and 4,260 billion rubles ($145 million) after selling a share in the subsidiary that was holding shares of Apatit OAO.
18 April 2013 - Russian fertiliser producer PhosAgro OJSC (MCX:PHOR) said Thursday it had launched a compulsory buyout for all remaining shares in apatite manufacturer Apatit OJSC it does not already own.
The company secured its 95.95% interest in Apatit, as a result of a mandatory buyout offer made to the targeta[euro](tm)s stockholders, after it won the tender for Russiaa[euro](tm)s 20% interest in Apatit, raising its stake to 77.57%.Country: RussiaSector: Metals/MiningTarget: Apatit OJSCBuyer: PhosAgro OJSCVendor: Minority shareholdersDeal size in USD: 62.5mType: Corporate acquisitionStatus: Bidding
The proceeds from additional share issuance will be used for consolidation of Apatit and Phosagro-Cherepovets as well as general corporate purposes.
In turn, the fertiliser producer will use the bulk of the proceeds from the capital hike to buy out minority shareholders in its units Apatit OJSC and OJSC PhosAgro-Cherepovets, it said on Monday.
Media reported Phosagro intends to consolidate its subsidiaries (Phosagro-Cherepovets and Apatit) until end of 2013.
27 February 2013 - Cyprus' Lacerta Holdings Ltd has shed its 5.19% interest in Apatit OJSC, news agency PRIME said, citing documents of the Russian apatite manufacturer.
27 February 2013 a[euro]" Cyprus' Lacerta Holdings Ltd has shed its 5.19% interest in Apatit OJSC, news agency PRIME said, citing documents of the Russian apatite manufacturer.