CALCITE

kălˈsīt, very widely distributed mineral, commonly white or colorless, but appearing in a great variety of colors owing to impurities. Chemically it is calcium carbonate, CaCO3, but it frequently contains manganese, iron, or magnesium in place of the calcium. It crystallizes in the hexagonal system, its crystals being characterized by highly perfect cleavage. Calcite also occurs in a number of massive forms, in which it may be coarsely to finely granular (as in marble), compact (as in limestone), powdery (as in chalk), or fibrous. One crystalline form, called dogtooth spar because of its dogtooth appearance, exhibits faces of perfect scalene triangles. Another form, satin spar, is finely fibrous and has a satin luster. Iceland spar is clear, transparent calcite. Other important forms of the mineral are limestone, marble, chalk, marl, stalactite and stalagmite formations, travertine, and Oriental alabaster. Millions of tons of calcite, in the form of limestone and marble, are mined annually. Besides its use as a building stone, it is the raw material for quicklime and cement, and is used extensively as a flux in smelting and as a soil conditioner.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Calcite
We found: 487 results
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books on: Calcite  - 371 results

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1.
Experiments in Egyptian Archaeology: Stoneworking Technology in Ancient Egypt
Book by Denys A. Stocks; Routledge, 2003
Subjects: Architecture, Ancient--Egypt, Building, Stone--Egypt--History, Egypt--Antiquities, Stonemasonry--Egypt--History
...representation of a seated driller hollowing a calcite vessel. From the tomb of Rekhmire at Thebes...147 5.14 A translucent Twelfth Dynasty calcite Duck Jar (MM 5341), found in the Southern...207 8.4 A 2 mm-diameter hole in calcite, made with the replica bronze bead drill...
2.
Bethsaida: A City by the North Shore of the Sea of Galilee - Vol. 2
Book by Rami Arav, Richard A. Freund; Truman State University Press, 1999
Subjects: Bethsaida (Extinct City), Bible--Antiquities, Excavations (Archaeology)--Israel--Bethsaida (Extinct City), Rabbinical Literature--History And Criticism
3.
Principles of Geology
Book by James Gilluly, Aaron C. Waters, A. O. Woodford, Robert R. Compton; W. H. Fremmil, 1958
Subjects: Geology
...transmission of light through the mineral calcite. One can easily observe this phenomenon by placing a fragment of transparent calcite above a dot on a sheet of paper. Instead of one dot, two are seen. If the calcite is revolved slowly, one dot describes...
4.
Principles of Geochemistry
Book by Giulio Ottonello; Columbia University Press, 1997
Subjects: Geochemistry
...stable aragonite phase of the CaCO 3 component see table 2.1 and figure 2.6 . In the P-T conditions of synthesis, the calcite polymorph, which has lower Gibbs free energy, should be formed instead of aragonite. Another example of metastable equilibrium...
5.
The Ecology of the Cambrian Radiation
Book by Andrey Yu. Zhuravlev, Robert Riding; Columbia University Press, 2001
Subjects: Geology, Stratigraphic--Cambrian, Paleoecology--Cambrian, Paleontology--Cambrian
...Middle Cambrian may have caused a shift from aragonite- to calcite-precipitating seas, providing suitable conditions for development...We see how, by means of biomineralization, shell beds and calcite debris contributed to the appearance of hardground communities...
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journal articles on: Calcite  - 35 results

       More journal Results: 1-10 11-20 21-30 31-35 >>  
 
1.
Chemical Analysis of World Trade Center Fine Particulate Matter for Use in Toxicologic Assessment
Journal article by John K. Mcgee, Lung Chi Chen, Mitchell D. Cohen, Glen R. Chee, Colette M. Prophete, Najwa Haykal-Coates, Shirley J. Wasson, Teri L. Conner, Daniel L. Costa, Stephen H. Gavett; Environmental Health Perspectives, Vol. 111, 2003
...sulfate (gypsum) and calcium carbonate (calcite) as major components. Scanning electron...destruction of the towers. Because gypsum and calcite are known to cause irritation of the mucus...dihydrate (gypsum) and calcium carbonate (calcite), and two were identified as minor constituents...
2.
Mapping and Prediction of Coal Workers' Pneumoconiosis with Bioavailable Iron Content in the Bituminous Coals
Journal article by Xi Huang, Weihong Li, Michael D. Attfield, Arthur Nadas, Krystyna Frenkel, Robert B. Finkelman; Environmental Health Perspectives, Vol. 113, 2005
...interactions of pyrite, sulfuric acid, calcite, and total iron. That is, iron present...produces ferrous sulfate and sulfuric acid. Calcite is the major component in coals that neutralizes...amounts of acid after neutralization of calcite and the amount of total iron in the coals...
3.
Household Units in the Analysis of Prehistoric Social Complexity, Southern Cook Islands
Journal article by Julie M.E. Taomia; Asian Perspectives: the Journal of Archaeology for Asia and the Pacific, 2000
Subjects: Antiquities--Cook Islands, Cook Islands--History, Dwellings, Prehistoric--Cook Islands, Prehistoric peoples--Cook Islands
...below about 20 cm) included a vertical calcite (stalactite or stalagmite) upright on...include the handle portion of a broken calcite pounder (in the midden area) and purposefully...consisting of adzes and a fragment of a calcite pounder). No radiocarbon dates were obtained...
4.
Estimation of Relative Bioavailability of Lead in Soil and Soil-Like Materials Using Young Swine
Journal article by Stan W. Casteel, Christopher P. Weis, Gerry M. Henningsen, William J. Brattin; Environmental Health Perspectives, Vol. 114, 2006
Subjects: Swine, United States. Environmental Protection Agency
...br/ Calcite -- -- 0.2...br/ Calcite...br/ Calcite...
5.
Reflections on "Scientific Reasoning of Students with Mild Mental Retardation: Investigating Preconceptions and Conceptual Change"
Journal article by Thomas E. Scruggs, Margo A. Mastropieri; Exceptionality, Vol. 5, 1994
Subjects: Exceptional Children, Special Education
...students to discover the properties of calcite in some unstructured manner. Rather, students...asked, for example, to place a specimen of calcite in a cup of vinegar and observe the results (the calcite begins to fizz). After two weeks of instruction...
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magazine articles on: Calcite  - 28 results

       More magazine Results: 1-10 11-20 21-28 >>  
 
1.
The Elegant Stone
Magazine article by Parvinder Sethi; World and I, Vol. 15, April 2000
Subjects: Marble sculpture--Analysis, Sand and gravel industry--History, Sand, gravel and stone industry--History, Stone industry--History
...result of medium-grade metamorphism of calcite (calcium carbonate) or dolomite (calcium magnesium carbonate). As calcite- and dolomite-rich rocks become buried...sedimentary rock composed chiefly of calcite) and dolomite are often encountered...
2.
Buried Secrets, Luminous Find
Magazine article by James E. Brady, George Hasemann, John H. Fogarty; Americas (English Edition), Vol. 47, July 1995
Subjects: Antiquities--Honduras, Archaeological expeditions--Honduras, Central American native peoples--Antiquities, Honduras--Tombs, cemeteries, etc.
...walls formed around pools of still water. Calcite dissolved in the water is deposited along...fascinating geologic accident had taken place. Calcite dissolved in the water was deposited on...cemented them to the floor. Crystals in the calcite sparkle in the light, giving rise to the...
3.
The Black Hills: Sketches of a Western Landscape
Magazine article by Martin D. Mitchell; Focus, Vol. 46, Spring 2002
Subjects: Black Hills--Environmental aspects, Mountains--Environmental aspects, Western States--Environmental aspects
...limestone abounds. Boxwork is comprised of calcite that precipitated into small capillaries, which...plastered with dogtooth and nailhead spar (calcite crystals) as shown in Figure 6, "Calcite crystals in Jewel Cave." In addition, frostwork...
4.
A Treasure in Green
Magazine article by Parvinder S. Sethi; World and I, Vol. 13, December 1998
Subjects: Bogota, Colombia--Discovery and exploration, Emeralds--Discovery and exploration
...minerals, such as chromite, mica, pyrite, calcite, or quartz. These inclusions serve as...the emeralds reside in deep veins of calcite, which crisscross Lower Cretaceous argillites...layers of black, pyritiferous shale. The calcite veins were formed when hydrothermal fluids...
5.
!Ojo!
Magazine article; Americas (English Edition), Vol. 51, March 1999
Subjects: Mayas--Art, Mexican native peoples--Historic sites, Mexico--Historic sites
...Classic period (circa A.D. 600-850); their historical significance is unparalleled. By the 1970s, though, a thick layer of calcite crust had settled on Bonampaks painted walls, making it nearly impossible to see the murals. To solve the problem, Mexicos...
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newspaper articles on: Calcite  - 27 results

       More newspaper Results: 1-10 11-20 21-27 >>  
 
1.
ENDLESS, LURAY AND SHENANDOAH CAVERNS: Virginia Caves Prove a Deep Experience for Young and Old
Newspaper article by Rick Britton; The Washington Times, July 22, 1999
...and gray from manganese and white from calcite. Endless Caverns lie beneath the western...semicircular walls formed on the floor where calcite was drawn to the edges of puddles - and...the shiny parts that youre seeing are calcite crystals," says Shenandoah Caverns tour...
2.
Spelunkers Dig Virginia; Caverns Delve into History of Both Geology and Mankind
Newspaper article; The Washington Times, February 27, 2003
...water droplets leave tiny deposits of calcite, which is made of calcium carbonate and...most common mineral found in caves. As calcite builds upon itself on the ceiling, stalactites...soil creates shades of gray or brown. Calcite gives a pure white color. "Nature decorates...
3.
Water Quality at Coatham Marsh
Newspaper article; Evening Gazette (Middlesbrough, England), May 21, 2008
Subjects: Steel industry
...into some of the older mounds and wash through high levels of calcite. When this reaches any standing water it rapidly smothers aquatic...samples) and a weir placed at the outflow end (to prevent the calcite sediments dispersing and making outflow difficult to measure...
4.
Weekend Mail: Cavern Club
Newspaper article; Birmingham Evening Mail (England), March 19, 2005
...young visitor their own pouch of Peak District rocks and minerals like those traditionally mined in the area including lead, calcite and fluorspar. Children entering the Heights between today and April 3 will be given a voucher which they canredeem for their...
5.
Meteors, Not God, Destroyed Sin Cities, Some Scientists Say
Newspaper article by Larry Witham; The Washington Times, April 8, 1997
...Peiser and his colleagues base their theory on deposits of a form of "calcite material" - found only on meteorites - in the 2000 B.C. ruins of three Middle East regions. The calcite findings are the work of French archaeologist Marie-Agnes Courty...
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encyclopedia articles on: Calcite  - 26 results

       More encyclopedia Results: 1-10 11-20 21-26 >>  
 
1.
Calcite
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
CALCITE kal sit, very widely distributed mineral, commonly white...crystals being characterized by highly perfect cleavage. Calcite also occurs in a number of massive forms, in which it may...has a satin luster. Iceland spar is clear, transparent calcite. Other important forms of the mineral are limestone...
2.
Stalactite and Stalagmite
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...stalactite is an icicle-shaped mass of calcite attached to the roof of a limestone cavern...the water solution and forms a ring of calcite on the roof of the cavern. By repetition...is increased. A stalagmite is a cone of calcite rising from the floor of a cavern. Stalagmites...
3.
Spar
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
SPAR For dogtooth spar, see calcite ; for fluorspar, see fluorite ; for heavy spar, see barite ; for satin spar, see calcite and gypsum . See also Iceland spar and feldspar . ____________________ Copyright 2009 Columbia University...
4.
Calcium Carbonate
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral...Such reactions on limestone (which is mainly composed of calcite) account for the formation of stalactites and stalagmites in...
5.
Dogtooth Spar
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
DOGTOOTH SPAR see calcite . ____________________ Copyright 2009 Columbia University Press. Used with the permission of Columbia University Press. All rights reserved.
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