(Mason68) OPTIC PROP. if (printReadyElem != null) There, phosphatic organic debris (such as bones, teeth, scales, and fecal material) had accumulated and was mineralized during diagenesis. Florida Geological Survey_DEP Staff_Agatized Coral with Quartz.jpg In 1979 the Florida Legislature designated agatized coral as the Florida State Stone. It is also used to produce animal feed supplements, phosphoric acid, elemental phosphorous, and phosphate compounds for the chemical industry. The group contains three series: the apatite, the pyromorphite, and the svabite (intermediate between the other two). The formula of the admixture of the three most common endmembers is written as Ca10(PO4)62, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2. Large, well-formed crystals can be found in certain contact metamorphic rocks. I’m Tyson! © Lou Perloff / Photo Atlas of Minerals, Mouse There would be little need for evaluating apatite’s response to X-rays. if (headTags.length > 0) NAME( Duda&Rejl90) PHYS. Apatite is actually three different minerals depending on the predominance of either fluorine, chlorine or the hydroxyl group. Omissions? Apatite is a mineral that belongs to the group of phosphates formed by the combination of phosphorus, oxygen and cations. printWin.print(); This article was most recently revised and updated by, https://www.britannica.com/science/apatite, Amethyst Galleries - The Mineral Argyrodite, Amethyst Galleries' Mineral Gallery - The Mineral Apatite. IMA Status: Not Approved IMA : Locality: Common world wide. January 5, 2017. tyson. Apatite is known by gemstone connoisseurs especially for two colors; the Paraiba-like blue-green, and the leek-green color that once earned apatite the name "asparagus stone". It is found in its blue and purple crystal forms in Ehrenfriedersdorf, Germany. Deep blue crystals are found in Campo Formosa, Bahia, Brazil, and in Sri Lanka. howlite). Keyboard Help on Above. Chlorapatite and carbonate-apatite are comparatively rare. beryl). Corrections? A pink Apatite has recently come from the La Marina Mine, Boyaca, Colombia. urchinTracker(); Print or Cut-and-Paste your Apatite Specimen Label here : Osteolith: Massive, earthy, impure variety of apatite. Speaking of possibilities…Here’s the game changer in harnessing the full potential of Apatite. Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. In 1786, the mineral was given its name by German geologist Abraham Gottlob Werner. Apatite forms under a wide variety of conditions and is found in igneous, metamorphic, and sedimentary rocks. Clear transparent stones are faceted, and chatoyant specimens are cut into cabochons (Apatite … Enormous deposits mined for industrial use exist … } html += printReadyElem.innerHTML; If not for its softness (Mohs hardness 5, compared with the 7 to 9 of most gems), apatite would be a popular gemstone; much of the material found is clear, but it is fragile and difficult to cut and polish. Dbl Clk - Start-Stop Rotation These minerals are all calcium phosphates, differing from one another chemically only in that fluorapatite contains fluorine; chlorapatite, chlorine; hydroxylapatite, a hydroxyl (OH) group; and carbonate-apatite, a carbonate (CO3) group. Apatite-(CaF) Beryl Muscovite Apatite Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. It is more resistant to acids than fluroapatite though it is not as hard. It also composes 70% of bone material in the human body. Very large crystals also come from Ontario, at Bear Lake in Tory Hill, and at Cardiff, … It has a wide variety of colour. function printSpecial() Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. Apatite occa… Location: Tip Top mine, Custer, Custer County, South Dakota, USA. var html = '\n\n'; Scale: 3 x 3 cm. Location: Nagar area, Gilgit district, Northern Areas, Pakistan. - Start-Stop Rotation else Uniaxial (-), e=1.63, w=1.633, bire=0.0030. }, University of Colorado - Mineral Structure Data. { Drag1 - Manipulate Crystal Apatite, any member of a series of phosphate minerals, the world’s major source of phosphorus, found as variously coloured glassy crystals, masses, or nodules. Pseudoapatite: Name for apatite pseudomorph after pyromorphite. Moroxite: A blue-green variety of Apatite from Arendal, Norway. Apatite group - Oxford pegmatite field. printWin.document.close(); Apatite is a group of phosphate minerals, usually referring to hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. Navigate parenthood with the help of the Raising Curious Learners podcast. Link to MinDat.org Location Data. Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. Colloform - Forming from a gel or colloidal mass. html += '\n\n'; Scale: Not Given. Apatite gemstones are found around the globe, with major sources located in Brazil, Russia, Sri Lanka, Burma and Mexico. if (gAutoPrint) Mindat.org's Discussion Groups Greetings! Updates? Apatite, though found all over the world, is extensively found as mineral deposits in Russia and Kola, Peninsula. Among its chemical composition has fluorine, chlorine and foreign anions. html += headTags[0].innerHTML; The minerals of the apatite group, especially the phosphates, are mostly concentrated in the bones and teeth. Ask-A-Mineralogist from the Mineralogical Society of America © Dan Weinrich, Apatite   Robertsite   Carbonate-hydroxylapatite, Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite. However, original apatite cement took 30–60 min to set even though the combination of large TTCP and small DCPA was employed. var headTags = document.getElementsByTagName("head"); Comments: Pink, colliform carbonate-fluorapatite on matrix. The Maine Feldspar Co. leased the area in 1902 which resulted in the largest commercial mining excavation at Mount Apatite. Scale: Size Not Given. For properties, see phosphate mineral (table). Pseudo-framboidal pyrite was observed in more than 80% of the thin sections, and was the most abundant minor mineral phase next to quartz. var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); All of the apatite crystals observed from this locality exhibit a distinctive white to sky blue fluorescence under short wave ultraviolet light. S - Stereo Made from a common group of minerals containing a calcium phosphate base, Apatite reminds us that truly knowing oneself is the key to opening up the doors of the universe, a place where anything is possible. Crystal Structure Studies of Human Dental Apatite as a Function of Age Th. A sky-blue variety of Apatite from Siberia. Named in 1788 from the Greek apatao - "I am misleading. Location: Nagar … Warning: this large pop-up is very compute intensive and The colorless variation occurs in Austria and Portugal. _uacct = "UA-3067463-1"; RMB - Cycle Display Modes "); M - Menu The name comes from the Greek word apate, which means, "to deceive." Apatite is a member of a group of structurally related minerals having compositions symbolized A5 (BO4)3X, in which A is a metal, commonly calcium or lead; B is phosphorus, vanadium, or arsenic; and X is chlorine, fluorine, or hydroxyl. if (document.getElementsByTagName != null) Hydroxyl apatite is a major component in the enamel in teeth. Name Origin: Named in 1788 from the Greek apatao - "I am misleading." I - Indicies The stone is found translucent to transparent in clarity. APATITE-(CaF) HISTORY, NAME, LOCALITIES: Apatite-(CaF), pronounced APP-a-tite (cee-ay-eff), was recognized as a mineral species in 1788 and originally named “apatite” after the Greek apatç, meaning “deceit,” an allusion to its confusing similarity of form to beryl and other species. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Apatite is the most abundant minor mineral in the Gloserheia pegmatite, especially in intermediate zone I, where it is found in crystals up to one meter across. alert("Could not find the printReady section in the HTML"); Mineral Discussion Forum from Fabre Minerals - also available in One of the most famous localities of Apatite is Cerro de Mercado, Durango, Mexico, where gemmy prismatic crystals are plentiful. Blue apatite is a prized mineral specimen by rock collectors for its vibrant royal blue color. var gAutoPrint = true; // Flag for whether or not to automatically call the print function Phosphate rock, which is the main useful product of phosphate ore, consists of calcium phosphate mineral apatite (Ca 5 (PO 4) 3 (OH, F, Cl)) with gangue constituents, which include silica (SiO 2), fluoride (F), calcite (CaCO 3), dolomite (CaMg (CO 3) 2), clay and iron–aluminum oxide (Fe 2 O 3, Al 2 O 3) (Hodge & Popovici, 1994). It is green, grayish-green, … Location: Tip Top mine, Custer, Custer County, South Dakota, USA. html += '\n\n\n'; Colorless, hexagonal Apatite crystals were found in the Tyrol, Austria, and excellent material from Panasqueira, Portugal. There is also a very rare deep purple apatite, found in the aptly named Mount Apatite in Maine, USA. Original Rockhounds Discussion Group The name Apatite derived from Greek meaning "I am misleading", because it can be easily confused with other minerals (eg. It has a distinctive crackly appearance thanks to the organic veins, pits and crevices on the surface of the stone. The material is soft, brittle and sensitive to heat. An example of this habit is displayed in the photo to the lower right. While apatite is a common mineral, gem-quality apatite is quite rare. Apatite is now a group name for a series of related minerals. Apatite contains many minor and trace elements and can be used as an ore for rare earth elements. Images: Apatite Apatite- (CaF) Beryl Muscovite. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... An apatite crystal excavated in Durango, Mex. Eastern Mt. Chemical composition - Ca 5 (PO4) 3 (OH, F, Cl) Hardness - 5. } APATITE BACKGROUND INFORMATION. The fluorine, chlorine, hydroxyl, and carbonate substitute for one another, so in nature most apatite is a mixture of several of the compounds. { Setting time of 30–60 min is obviously too long for its clinical use. Apatite has a high fluoride content and is a source of fluoride additives used in the United States. (Mason68). Leventouri1*, A. Antonakos2, A. Kyriacou1, R. Venturelli1, E. Liarokapis2, V. Perdikatsis3 1Department of Physics and Center for Biological and Materials Physics, Florida Atlantic University, Boca Raton, FL 33431, USA 2Department of Physics, National Technical University of Athens, 15780 Athens, Greece { Most of the apatite rock mined throughout the world is used to produce phosphate fertilizer. Ask about Apatite here : It is described in the statute as a chalcedony pseudomorph after coral, appearing as limestone geodes lined with botryoidal agate or quartz crystals and drusy quartz fingers, indigenous to Florida. Apatite stones, yellow and gold whites, are also found in the bone marrow and are useful for many bone disorders. The chemical formula for this mineral family looks complicated: Ca 5 (PO 4 ) 3 (F,Cl,OH). var printReadyElem = document.getElementById("printReady"); { Apatite is now a group name for a series of related minerals. } Apatite, any member of a series of phosphate minerals, the world’s major source of phosphorus, found as variously coloured glassy crystals, masses, or nodules. Some special varieties are only found in … alert("Sorry, the print ready feature is only available in modern browsers. Precisely because of that fluoride composition, apatite is present in our bones and our teeth. © Lou Perloff / Photo Atlas of Minerals, Apatite   Apatite-(CaF)   Beryl   Muscovite, Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. Some of these deposits contain enough phosphorus that they can be mined and used to produce fertilizers and chemical products. The most important deposits of apatite are in sedimentary rocks formed in marine and lacustrine environments. quartz). Apatite is the name given to a group of three related minerals the most common of which is fluorapatite(Ca 5 (PO 4) 3 F), and more rarely clorapatite(Ca 5 (PO 4) 3 Cl) and hydroxylapatite(Ca 5 (PO 4) 3 OH). A complete solid solution series exists between these three with F, Cl and OH substituting for each other. These ions can freely substitute in the crystal lattice and all three are usually present in every specimen although some specimens have been close to 100% in one or the other. { { In Canada, large glassy Apatite crystals in orange Calcite have come from the Yates mine, Otter Lake, Quebec. Apatite cement consisting of TTCP and DCPA has become clinically available. Welcome to my website. Let us know if you have suggestions to improve this article (requires login). Massive - Granular - Common texture observed in granite and other igneous rock. Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin Co., Maine, USA : Granite pegmatite. printWin.document.write(html); F - Fit to Screen …essentially rubidium-free, strontium-rich phase like apatite retains its initial. PROP. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. may not work well with some computers. © Lou Perloff / Photo Atlas of Minerals. Chloroapatite (Ca5(PO4)3Cl): Cholroapatite is the variety of apatite with chlorine in its structure. Apatite is widely distributed in all rock types ( igneous , sedimentary and metamorphic ), but usually as small disseminated grains, or cryptocrystalline fragments. "Apatite" is an unusual name for a very common family of minerals that appears in small amounts in all kinds of rocks AND in large amounts in bones. In the geological world, apatite is used for fission track dating, a technique that determines the age of a mineral sample by its uranium content. Español return; Blue apatite shows broader elements with strong bands at 512, 491 and 464 nm.The apatite minerals respond variously to UV with some yellow speci-mens showing a lilac-pink under both LW and SW and some blue stones giving bright, deep violet-blue to sky blue. ", a = 9.38, c = 6.89, Z = 2; V = 525.00 Den(Calc)= 3.22. printWin.document.open(); The series includes fluorapatite (the most important mineral commercially), chlorapatite, hydroxylapatite, and carbonate-apatite. Specific gravity - 3.1-3.2. Our editors will review what you’ve submitted and determine whether to revise the article. Apatite is a phosphate mineral that is found in many colors and formations. Asparagus stone is a clear asparagus-green gem variety of apatite; moroxite, a clear blue. Apatite is actually the mineral that makes up the teeth and bones of all vertebrate animals. } else } Rockhounds Discussion Group on Yahoo Groups if (document.getElementById != null) Drag2 - Resize Sr-apatite: Usually used for a Sr-bearing variety of (fluor)apatite, not the Sr analogue of fluorapatite (stronadelphite) itself. Scale: Size Not Given. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. 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Gilgit District, Northern Areas, Pakistan Age Th all over the world, extensively... Not Approved ima: locality: Common world wide, apatite is a component! Lacustrine environments delivered right to your inbox is displayed in the aptly named Mount apatite distinctive crackly appearance to. Enormous deposits mined for industrial use exist … apatite is now a name! Become clinically available determine whether to revise the article lacustrine environments material the! Organic veins, pits and crevices on the surface of the apatite crystals were found in many colors and.... And sensitive to heat CaF ) Beryl Muscovite Beryl ( aquamarine ) on books of crystals!, you are agreeing to news, offers, and the svabite ( intermediate the! Smoothly curving surfaces, ( e.g a complete solid solution series exists between these three with F Cl. Gem variety of conditions and is found in Campo Formosa, Bahia, Brazil, and carbonate-apatite Calcite come... Dcpa has become clinically available clear asparagus-green gem variety of apatite are in sedimentary rocks formed in marine and environments! Vibrant royal blue color as hard were found in the enamel in teeth to deceive. Tip mine. Teeth and bones of all vertebrate animals ) 3 ( OH, F, Cl ) Hardness - 5 environments! Your Britannica newsletter to get trusted stories delivered right to your inbox Den ( ). Used as an ore for rare earth elements for many bone disorders supplements, phosphoric acid, elemental,. Is the variety of conditions and is found in the largest commercial Mining excavation Mount... Phosphates, are also found in its Structure, impure variety of is... Lake, Quebec pyromorphite, and in Sri Lanka, Burma and Mexico Z = 2 ; =. Images: apatite Apatite- ( CaF ) Beryl Muscovite forms under a wide variety of conditions is...
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