apatite
From: The Columbia Encyclopedia, Sixth Edition
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Date: 2008
apatite , 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 dating ). Commercial deposits are mined in Idaho, Tennessee, and Wyoming, and in N Africa and Russia.
Author not available, APATITE.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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Cell-mediated bioresorption of sintered carbonate apatite in rabbits
Journal of Bone and Joint Surgery; 1/1/2003; Hasegawa, Masahiro; Doi, Yutaka; Uchida, Atsumasa; 3099 words;
Bone apatite contains carbonate and is therefore not ... successfully developed sintered carbonate apatite (CA) with a concentration of carbonate ... therefore contained resorbable phases. Bone apatite is not pure hydroxyapatite (CA^sub 10 ...
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Apatite.(Jewel of the Month)
Jewelers Circular Keystone; 11/1/2004; Roskin, Gary; 1301 words;
... teal-color rough stand out in this image of apatite, furnished by L. Allen Brown of All That ... may conjure thoughts of food, the name apatite has little to do with eating. Its source ... OMITTED] [ILLUSTRATION OMITTED] Some say apatite got its name because it's a group of more ...
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Beneficiation of apatite rock phosphates by calcination: effects on chemical properties and fertiliser effectiveness.
Australian Journal of Soil Research; 3/1/2001; Lim, H. H. Gilkes, R. J.; 1922 words;
Introduction Most rock phosphates (RPs) are apatite-bearing rocks that contain enough phosphorus (P ... Carolina, and Sechura contain francolite (carbonate apatite) as the major apatite mineral, while Queensland and Christmas Island A-o ...
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Fate of calcite, apatite and feldspars in an ombrotrophic peat bog, Black Forest, Germany
Journal of the Geological Society; 7/1/2006; Roux, Gaël Le; Laverret, Emmanuel; Shotyk, William; 4255 words;
... entering the bog is mainly of local origin. Apatite and calcite are restricted to the top ... rapid dissolution. The release of P by apatite dissolution is possibly the main source ... K-feldspar and Ti-rich biotite (Sawatzki 1992). Apatite is a common accessory mineral (<0.5 ...
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Finland's Siilinjarvi plans expansion. (new apatite/phosphate minerals mine site)
Mining Magazine; 7/1/1991; 1063 words;
... Kemira Oy expects to set a new record for apatite production from Siilinjarvi, and is currently ... the country's largest mine, and the only apatite mine in Western Europe. (Mining Magazine ... waste for the production of 546,134 t of apatite concentrate, 97,852 t of agricultural ...
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ORTHOPAEDICS - Apatite formation of three kinds of bioactive material at an early stage in vivo a comparative study by transmission electron microscopy
Biomedical Materials; 10/1/1993; 243 words;
Apatite formation on the surface of materials in vivo at an early ... region on and after the third day. A collagen-free thin apatite layer on the surface of the material was evident on and after the seventh day. This apatite layer was observed before the mineralization of the surrounding ...
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LA Trails to lead Mt. Apatite hikes
Sun-Journal Lewiston, Me.; 4/9/2008; 257 words;
... the public to join them on hikes at Mt. Apatite. While Earth Day is Tuesday, April 22 ... commercial feldspar in the quarries of Mt. Apatite also uncovered rare minerals and crystals ... improvement for the past six years. Mt. Apatite is "truly a beautiful park filled with ...
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Apatite-coated titanium oxide kills bacteria and fungi.
Advanced Ceramics Report; 3/1/2000; 388 words;
... surface-coated with microscopic beads of apatite. To do so, they add powdered titanium ... to decompose organic molecules, while apatite (which occurs naturally in bones and teeth ... it cannot attract organic molecules. Apatite has the ability to adsorb organic molecules ...
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Mt. Apatite land swap may alter park trail
Sun-Journal Lewiston, Me.; 5/21/2007; Scott Taylor; 357 words;
... long-forgotten trade for athletic fields at the foot of Mount Apatite could send hikers and gem hunters looking for a new way up. The deal could close access to the 325-acre Mount Apatite Park off Garfield Road, beyond the city's athletic fields ...
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Triangular pieces of ammolite are highlighted by tanzanite, garnet, tourmaline, sapphire, fire opal, amethyst, citrine, and apatite in this necklace and earring set.(Jewelry)(Advertisement)
Jewelers Circular Keystone; 9/1/2003; 34 words;
Triangular pieces of ammolite are highlighted by tanzanite, garnet, tourmaline, sapphire, fire opal, amethyst, citrine, and apatite in the necklace and earring set. Carolyn Tyler, Santa Barbara Calif.; (808) 965-4445.
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Sapo mine apatite.(Letter to the editor)
The Mineralogical Record; 3/1/2006; Pezzotta, Federico; 367 words;
... first heard that the crystals had been identified as carbonate-apatite (lacking fluorine) but I was not confident of the preliminary ... circulate in the mineral specimen market and, inasmuch as carbonate-apatite is not a valid species name, some people (probably dealers ...
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Attempt to Dating of Accretion in the West Carpathian Flysch Belt: Apatite Fission Track Thermochronology of Tuff Layers
Geolines; 1/1/2006; Botor, Dariusz; Dunkl, István; Rauch-Wlodarska, Marta; Eynatten, Hilmar von; 1416 words;
... the tectonic stacking. We have performed apatite fission track (FT) thermochronology on ... structural evolution of the flysch belt. The apatite FT dating were completed by the investigation ... dated grains and also indicate that the apatites of the samples derived form single sources ...
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Reconstructing Post-Carboniferous History of the Krkonose Piedmont Basin Using Detrital Apatite Fission-Track Data
Geolines; 1/1/2006; Martínek, Karel; Svojtka, Martin; Filip, Jirí; 553 words;
... record is missing. Fission-track (FT) apatite data (12 samples) yield ages indicating ... from all other samples. Mean detrital apatite FT age is older (ca. 26723 Ma, 1 sigma ... ca. 240 Ma), which is interpreted as apatite annealing (below 120C) in sedimentary ...
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Post-Sedimentary Mesozoic - Cenozoic Thermotectonic Evolution of the Krkonose Piedmont Basin (Bohemian Massif) Interpreted from Apatite Fission-Track Analysis
Geolines; 1/1/2005; Martínek, Karel; Svojtka, Martin; Filip, Jirí; 748 words;
... fission-track (FT) dating of detrital apatites. The Krkonose Piedmont Basin belongs to ... stratigraphic or structural record exists. The apatite fission track data reveal low-temperature ... and carbonate-cemented intervals. The apatite fission track lengths in all studied samples ...
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Diachronous late-stage exhumation across the western Alpine arc: constraints from apatite fission-track thermochronology between the Pelvoux and Dora-Maira Massifs
Journal of the Geological Society; 1/1/2007; Tricart, Pierre; Van der Beek, Peter; Schwartz, Stephane; Labrin, Erika; 9250 words;
Abstract: We present new apatite fission-track (AFT) data from the central ... relatively large and growing number of apatite fission-track (AFT) data (Seward & ... lithologies that contain sufficient apatite. Further south, existing AFT ages are ...
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