calcium carbonate

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calcium carbonate

calcium carbonate CaCO ₃ , white chemical compound that is the most common nonsiliceous mineral. It occurs in two crystal forms: calcite, which is hexagonal, and aragonite, which is rhombohedral. Calcium carbonate is largely insoluble in water but is quite soluble in water containing dissolved carbon dioxide, combining with it to form the bicarbonate Ca(HCO ₃ ) ₂ . Such reactions on limestone (which is mainly composed of calcite) account for the formation of stalactites and stalagmites in caves. Iceland spar is a pure form of calcium carbonate and exhibits birefringence, or double refraction .

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calcium carbonate

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

calcium carbonate (CaCO₃) White compound, insoluble in water, that occurs naturally as marble, chalk, limestone and calcite. Crystals are in the hexagonal system and vary in form. Calcium carbonate is used in the manufacture of cement, iron, steel and lime, to neutralize soil acidity and as a constituent of antacids. Properties: r.d. 2.7 (calcite).

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calcium carbonate

A Dictionary of Nursing | 2008 | Â© A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

calcium carbonate (kar-bŏ-nayt) n. a salt of calcium that neutralizes acids and is used in many antacid preparations. It is also used as a calcium supplement and to reduce high blood levels of phosphates (which it binds) in patients with renal failure. Formula: CaCO₃.

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	Advances in the development and application of nanometer calcium carbonate. (Market Report).(Brief Article) Magazine article from: China Chemical Reporter; 4/16/2002
	Rapid Development of Calcium Carbonate. Magazine article from: China Chemical Reporter; 9/30/1999
	Rapid development of the calcium carbonate sector.(Inorganics) Magazine article from: China Chemical Reporter; 9/16/2004

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	Advances in the development and application of nanometer calcium carbonate. (Market Report).(Brief Article) Magazine article from: China Chemical Reporter; 4/16/2002; ; 600 words ; Nanometer calcium carbonate refers to superfine calcium carbonate powder with a particle size between 1nm and 100nm...recent years has greatly promoted the consumption of calcium carbonate. The market demand of nanometer superfine calcium... Read more
	Rapid Development of Calcium Carbonate. Magazine article from: China Chemical Reporter; 9/30/1999; 379 words ; ...China has nearly 400 heavy calcium carbonate producers with an annual output...million tons and nearly 300 light calcium carbonate producers with an annual output...Based on a 10% addition rate of calcium carbonate, more than 1 million tons of... Read more
	Rapid development of the calcium carbonate sector.(Inorganics) Magazine article from: China Chemical Reporter; 9/16/2004; 700+ words ; ...of 2003 China had 380 light calcium carbonate producers. The annual output...technology From the 1980s the calcium carbonate industry in China started a...overall development of the calcium carbonate industry. (2) Increase of product... Read more
	Present production status of nanometer calcium carbonate.(Inorganics) Magazine article from: China Chemical Reporter; 1/6/2008; ; 588 words ; ...demand The output of nanometer calcium carbonate in China has increased rapidly...that the demand for nanometer calcium carbonate in China will reach 750 000...import amount of nanometer calcium carbonate in China reduced constantly... Read more
	Calcium Carbonate Market.(capacity, imports, output)(Brief Article)(Statistical Data Included) Magazine article from: China Chemical Reporter; 9/6/2001; ; 546 words ; The total capacity of calcium carbonate in China is 4.0 million t/a...the product structure of the calcium carbonate sector in China. The capacity...in the domestic precipitated calcium carbonate sector was totally turned into... Read more
	Light calcium carbonate project starts production in Guilin.(PROJECT NEWS)(Guangxi Guilin Jinshan Chemical Plant )(Brief Article) Magazine article from: China Chemical Reporter; 8/6/2005; 131 words ; The first phase of the 300 000 t/a light calcium carbonate project, the largest in China, started...including industrial-grade precipitation calcium carbonate, papermaking-grade calcium carbonate, food-grade calcium carbonate, wet-process... Read more
	Nanometer calcium carbonate production line puts on stream.(Shandong Shengda Science and Technology Co. Ltd.)(Brief article) Magazine article from: China Chemical Reporter; 11/6/2006; 155 words ; The 100 000 t/a nanometer calcium carbonate production line constructed...capacity of 60 000 t/a nanometer calcium carbonate and production will start in...capacity of 160 000 t/a nanometer calcium carbonate at that time. SSTC and Tsinghua... Read more
	Light Calcium Carbonate Produced from Calcium Carbide Residue.(Brief Article) Magazine article from: China Chemical Reporter; 3/16/2000; 134 words ; Most calcium carbonate at home and abroad is produced from superior quality limestone...has developed the technology for the production of light calcium carbonate and fine calcium carbonate from calcium carbide residue and carbon dioxide effluent... Read more
	10 000 t/a nanometer calcium carbonate project. (Project: News).(Shandong Shengda Science and Technology Company Ltd.)(Brief Article) Magazine article from: China Chemical Reporter; 2/26/2003; 280 words ; The 10 000 t/a nanometer calcium carbonate project funded by Shandong...The capacity of nanometer calcium carbonate in the company is expected...end of this year. * Nanometer calcium carbonate is one of nanometer powders... Read more
	High-grade calcium carbonate market keeps expanding. (Market Report).(Industry Overview) Magazine article from: China Chemical Reporter; 1/16/2003; ; 345 words ; ...resources and the production of calcium carbonate in the world. The total capacity of calcium carbonate in China has reached 4.0 million...import amount of high-grade calcium carbonate in China has been maintained... Read more