html += headTags[0].innerHTML; if (document.getElementsByTagName != null) Uniaxial (-), e=1.63, w=1.633, bire=0.0030. The name Apatite derived from Greek meaning "I am misleading", because it can be easily confused with other minerals (eg. printWin.print(); In 1786, the mineral was given its name by German geologist Abraham Gottlob Werner. } Apatite occa… var gAutoPrint = true; // Flag for whether or not to automatically call the print function Pseudoapatite: Name for apatite pseudomorph after pyromorphite. return; The most important deposits of apatite are in sedimentary rocks formed in marine and lacustrine environments. Apatite is actually three different minerals depending on the predominance of either fluorine, chlorine or the hydroxyl group. The stone is found translucent to transparent in clarity. In Canada, large glassy Apatite crystals in orange Calcite have come from the Yates mine, Otter Lake, Quebec. For properties, see phosphate mineral (table). (Mason68) OPTIC PROP. 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 also composes 70% of bone material in the human body. January 5, 2017. tyson. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. © 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. 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. Corrections? Setting time of 30–60 min is obviously too long for its clinical use. F - Fit to Screen Pseudo-framboidal pyrite was observed in more than 80% of the thin sections, and was the most abundant minor mineral phase next to quartz. Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin Co., Maine, USA : Granite pegmatite. 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. Florida Geological Survey_DEP Staff_Agatized Coral with Quartz.jpg In 1979 the Florida Legislature designated agatized coral as the Florida State Stone. Warning: this large pop-up is very compute intensive and alert("Sorry, the print ready feature is only available in modern browsers. html += '\n\n'; Specific gravity - 3.1-3.2. It is found in its blue and purple crystal forms in Ehrenfriedersdorf, Germany. Scale: Size Not Given. Some of these deposits contain enough phosphorus that they can be mined and used to produce fertilizers and chemical products. It has a wide variety of colour. There, phosphatic organic debris (such as bones, teeth, scales, and fecal material) had accumulated and was mineralized during diagenesis. { The chemical formula for this mineral family looks complicated: Ca 5 (PO 4 ) 3 (F,Cl,OH). Rockhounds Discussion Group on Yahoo Groups html += printReadyElem.innerHTML; Scale: 3 x 3 cm. ", a = 9.38, c = 6.89, Z = 2; V = 525.00 Den(Calc)= 3.22. Comments: Pink, colliform carbonate-fluorapatite on matrix. Greetings! Our editors will review what you’ve submitted and determine whether to revise the article. - Start-Stop Rotation Sr-apatite: Usually used for a Sr-bearing variety of (fluor)apatite, not the Sr analogue of fluorapatite (stronadelphite) itself. One of the most famous localities of Apatite is Cerro de Mercado, Durango, Mexico, where gemmy prismatic crystals are plentiful. Apatite is widely distributed in all rock types ( igneous , sedimentary and metamorphic ), but usually as small disseminated grains, or cryptocrystalline fragments. 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. { © Dan Weinrich, Apatite   Robertsite   Carbonate-hydroxylapatite, Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite. An example of this habit is displayed in the photo to the lower right. Dbl Clk - Start-Stop Rotation Link to MinDat.org Location Data. 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. However, original apatite cement took 30–60 min to set even though the combination of large TTCP and small DCPA was employed. { Colloform - Forming from a gel or colloidal mass. The name comes from the Greek word apate, which means, "to deceive." Chemical composition - Ca 5 (PO4) 3 (OH, F, Cl) Hardness - 5. Apatite cement consisting of TTCP and DCPA has become clinically available. } Apatite is actually the mineral that makes up the teeth and bones of all vertebrate animals. Chlorapatite and carbonate-apatite are comparatively rare. var html = '\n\n'; Apatite is a mineral that belongs to the group of phosphates formed by the combination of phosphorus, oxygen and cations. IMA Status: Not Approved IMA : Locality: Common world wide. The sections were investigated with reflected and transmitted light, and contained predominantly calcite, with minor mineral phases identified as quartz, pyrite, apatite, dolomite, and chert. Location: Nagar … 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. Help on Above. All of the apatite crystals observed from this locality exhibit a distinctive white to sky blue fluorescence under short wave ultraviolet light. else 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. Apatite group - Oxford pegmatite field. APATITE BACKGROUND INFORMATION. var headTags = document.getElementsByTagName("head"); Massive - Granular - Common texture observed in granite and other igneous rock. It is also used to produce animal feed supplements, phosphoric acid, elemental phosphorous, and phosphate compounds for the chemical industry. Clear transparent stones are faceted, and chatoyant specimens are cut into cabochons (Apatite … 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. Deep blue crystals are found in Campo Formosa, Bahia, Brazil, and in Sri Lanka. } _uacct = "UA-3067463-1"; There would be little need for evaluating apatite’s response to X-rays. 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. Mineral Discussion Forum from Fabre Minerals - also available in { It is more resistant to acids than fluroapatite though it is not as hard. 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'); Original Rockhounds Discussion Group The material is soft, brittle and sensitive to heat. Navigate parenthood with the help of the Raising Curious Learners podcast. Crystal Structure Studies of Human Dental Apatite as a Function of Age Th. if (headTags.length > 0) Named in 1788 from the Greek apatao - "I am misleading. Images: Apatite Apatite- (CaF) Beryl Muscovite. Colorless, hexagonal Apatite crystals were found in the Tyrol, Austria, and excellent material from Panasqueira, Portugal. { Moroxite: A blue-green variety of Apatite from Arendal, Norway. 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