calcium carbonate

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calcium carbonate,

CaCO3, 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(HCO3)2. Such reactions on limestonelimestone,
sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making it blue, black, or gray. The texture varies from coarse to fine.
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 (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 refractionrefraction,
in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass.
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Calcium Carbonate

 

CaCO3, a salt.

Calcium carbonate occurs in nature in two mineral forms with differing crystalline structures: aragonite and the widely distributed calcite. Calcium carbonate decomposes when heated above 900°C: CaCO3 = CaO + CO2 (a means of obtaining lime). It is sparingly soluble in water (14 mg calcite per liter at 18°C) and readily soluble in acids. Natural calcium carbonate (limestone, marble) is used as a construction material; chalk (powdered calcium carbonate) serves as a filler for rubber stock, paper, and linoleum. A softer and finer product, called precipitated calcium carbonate (obtained through the reaction of CaCl2 and Na2CO3), is used in the manufacture of tooth powderand cosmetics.

calcium carbonate

[′kal·sē·əm ′kär·bə‚nāt]
(inorganic chemistry)
CaCO3 White rhombohedrons or a white powder; occurs naturally as calcite; used in paint manufacture, as a dentifrice, as an anticaking medium for table salt, and in manufacture of rubber tires.

calcium carbonate

A low-density white pigment for use in paint; provides little opacity; used mainly to provide bulk and flatness.

calcium carbonate

a white crystalline salt occurring in limestone, chalk, marble, calcite, coral, and pearl: used in the production of lime and cement. Formula: CaCO3
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Advil, Centrum, Caltrate, ChapStick and Robitussin.
I thought that taking my multivitamin or Caltrate was sufficient.
FOODS RICH IN CALCIUM Approximate elemental calcium content per serving: FOOD SERVING SIZE ELEMENTAL CALCIUM Milk 1 glass (8 oz) 300 mg Yogurt 1 cup (8 oz) 400 mg Ice cream 1 cup (8 oz) 400 mg Cheese 1 oz 200 mg Sardines with bones 3 oz 370 mg Collards 1 cup 200 mg Broccoli 1 cup 130 mg Calcium-fortified Orange juice 1 glass (8 oz) 300 mg ELEMENTAL CALCIUM CONTENT OF SELECTED CALCIUM SUPPLEMENTS Name Brand Strength (total) Elemental calcium Alka Mints 850 mg 340 mg Caltrate 1,500 mg 600 mg OsCal 625 mg 250 mg Rolaids 550 mg 220 mg Tums 500 mg 200 mg
Whitehall Laboratories Huntercombe Lane South Taplow Maidenhead Berkshire SL6 7PQ Tel: 01628 669011 Fax: 01628 669846 Helpline: 0800 296034 KEY PERSONNEL Managing director D Beauchamp Commercial director R Honeybourne Sales director P Hawkins Marketing director E Hughes Medical director Dr H Scorer Analgesics category manager C Harmes Nutritionals category manager M Cooper KEY PRODUCTS Analgesics Multivitamins Antacids KEY BRANDS Anadin Advil Bisodol Centrum Caltrate Chap Stick Preparation H Robitussin Traxam
Caltrate Plus is a bone mineral supplement that is particularly suitable for people who do not or cannot use sufficient dairy foods as part of their diet.
Calcium carbonate (in products like Tums, Caltrate, and Os-Cal) has the most calcium per tablet.
Whitehall Laboratories has launched a bone mineral supplement called Caltrate Plus.