Find more facts and information on our topic page about
apatite
apatite
apatite A widely distributed
phosphate mineral, with the formula Ca
5(PO
4)
3(F,Cl,OH); sp. gr. 3.1–3.3;
hardness 5;
hexagonal; usually a shade of green or grey-green, but may also be white, brown, yellow, bluish, or red; white
streak;
vitreous lustre;
crystals commonly hexagonal
prisms, and often
tabular, also occurs
massive, and granular;
cleavage, basal {0001}, imperfect prismatic {1010}; found as an
accessory mineral in
igneous rock, in
pegmatites and high-temperature hydrothermal veins, and in
metamorphic rocks. It is the principal constituent of fossil bones (see also
COLLOPHANE). Apatite is widely used as a phosphate fertilizer, and for the production of phosphoric acid and various other chemicals.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
Apatite.(Jewel of the Month)
Magazine article from: Jewelers Circular Keystone; 11/1/2004; ; 700+ words
; ...and blue-green apatite is found in northern...gems known as neon apatites coming from southern...the major reasons apatite is in short supply...literature, blue apatites have been found...images. Violet apatites are said to have...sapphire blue." Apatite's color range...
|
|
ORTHOPAEDICS: Apatite-organic polymer composites may prove useful in bone repair
Newspaper article from: Biomedical Materials; 2/1/1996; 399 words
; ...Kyoto University believe they have found apatite-polymer composites that may prove useful...scientists created a dense and uniform apatite layer about 20 pm thick formed on a poly...discharge in oxygen, They then implanted the apatite-polymer composite obtained into a rabbit...
|
|
In vitro apatite formation is good screening test for in vivo bioactivity.
Newspaper article from: Biotech Week; 3/19/2003; 691 words
; ...from Japan has shown that "evaluating apatite formation in simulated body fluid is a...in vivo bioactivity with the in vitro apatite-forming ability of biomaterials. Granules...subscript]2 glasses, showing different apatite-forming ability in simulated body fluid...
|
|
Nanocrystalline apatite-based biomaterials.(Brief article)(Book review)
Magazine article from: SciTech Book News; 6/1/2009; 500 words
; ...on nanocrystalline apatite composition, structure...of nanocrystalline apatites involved in the preparation...of nanocrystalline apatites. Physico-chemical...of nanocrystalline apatites are presented, and examples of apatite-based biomaterials...
|
|
Beneficiation of apatite rock phosphates by calcination: effects on chemical properties and fertiliser effectiveness.
Magazine article from: Australian Journal of Soil Research; 3/1/2001; ; 700+ words
; Introduction Most rock phosphates (RPs) are apatite-bearing rocks that contain enough phosphorus...Carolina, and Sechura contain francolite (carbonate apatite) as the major apatite mineral, while Queensland and Christmas Island...
|
|
Apatite fission track implications for timing of hydrothermal fluid flow in Tertiary volcanics of the Bohemian Massif
Magazine article from: Journal of Geosciences; 12/31/2007; ; 700+ words
; ...Bohemian Massif were subjected to apatite fission track (AFT) and K...subvolcanic bodies. Instead, apatites from these rocks are believed...Bohemian Massif, fission tracks, apatite, K-Ar dating, volcanic...ages were also subjected to apatite fission track dating. Surprisingly...
|
|
Apatit reduces apatite concentrate output 2% in 2007.
Newspaper article from: Russia & CIS Business and Financial Newswire; 1/24/2008; 444 words
; Apatit reduces apatite concentrate output 2% in 2007 MOSCOW...part of the PhosAgro holding, reduced apatite concentrate output 2% in 2007 to 8...increased 19% to 1 million tonnes. Apatite and nepheline ore output increased 1...
|
|
|
Russia's Apatit reduces apatite concentrate output 2% in Q1.
Newspaper article from: Russia & CIS Business and Financial Newswire; 4/15/2008; 640 words
; Russia's Apatit reduces apatite concentrate output 2% in Q1 MOSCOW...part of the PhosAgro holding, reduced apatite concentrate output 2.1% to 2.013...amount as in January-March 2007. Apatite and nepheline ore output fell 4% to...
|
|
Apatite crystals were noted on the surface of collagen fibrils in woven bone.
Newspaper article from: Medical Devices & Surgical Technology Week; 5/18/2003; 694 words
; ...NewsRx.com & NewsRx.net) -- Apatite crystals were noted on the surface of...investigate the morphology and distribution of apatite crystals in woven bone, mineralized collagen...mature crystals from lamellar bone, the apatite crystals in woven bone are also platelet...
|
|
Attempt to Dating of Accretion in the West Carpathian Flysch Belt: Apatite Fission Track Thermochronology of Tuff Layers
Magazine article from: Geolines; 1/1/2006; ; 700+ words
; ...the flysch belt. The apatite FT dating were completed...also indicate that the apatites of the samples derived...these ash-layers apatites are usually chlorine...composition of Durango apatite (~0.4 wt%), thus...temperature for the dated apatites. The reset of fission...
|
|
apatite
Book article from: The Columbia Encyclopedia, Sixth Edition
apatite , mineral, a phosphate of calcium containing...brown, yellow, white, red, and purple. Apatite is a minor constituent in igneous and metamorphic...green manganapatite are used in jewelry. Apatite is mined to make phosphatic fertilizers...
|
|
Biogeochemical Cycles
Book article from: Plant Sciences
...example, starts with its release from apatite (phosphorus-containing rock...phosphorus in most soils derive from apatite. Mechanical and chemical weathering reactions release phosphorus from apatite into the soil solution. Plants take...
|
|
|
Auburn
Book article from: The Columbia Encyclopedia, Sixth Edition
...manufactured there since c.1835) and bricks; in the late 20th cent., however, industry declined. Nearby Mt. Apatite is a source of apatite and feldspar. 3 City (1990 pop. 31,443), seat of Cayuga co., W central N.Y., in the Finger Lakes...
|
|
SIC 1475 Phosphate Rock
Encyclopedia entry from: Encyclopedia of American Industries
...melting), or otherwise preparing phosphate rock, including apatite. NAICS Code(s) 212392 (Phosphate Rock Mining) In 2003...known as phosphorite, which was largely comprised of carbonite apatite. The phosphate rock mining and preparation industry produced...
|
|
Mohs' Scale
Book article from: World of Earth Science
...talc, (2) gypsum , (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase feldspar , (7) quartz , (8) topaz...assigned a Mohs hardness number of 5.5 because it will scratch apatite (Mohs' hardness number 5) but will not scratch orthoclase...
|
